Articles de revues : « Electroactive Molecules »

1

Gorman, Christopher B. « Encapsulated electroactive molecules ». Advanced Materials 9, n^o 14 (1997) : 1117–19. http://dx.doi.org/10.1002/adma.19970091412.

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Dai, Yunlong, et Xianwen Kan. « From non-electroactive to electroactive species : highly selective and sensitive detection based on a dual-template molecularly imprinted polymer electrochemical sensor ». Chem. Commun. 53, n^o 86 (2017) : 11755–58. http://dx.doi.org/10.1039/c7cc06329f.

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A selective and sensitive detection of non-electroactive and electroactive molecules has been achieved on a dual-template imprinted electrochemical sensor. And the proposed dual-signal strategy can be used for highly sensitive detection of electroactive analytes.

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Coronado, E., J. R. Galán-Mascarós et C. J. Gómez-García. « Hybrid molecular magnets incorporating organic donors and other electroactive molecules ». Synthetic Metals 102, n^o 1-3 (juin 1999) : 1459–60. http://dx.doi.org/10.1016/s0379-6779(98)00518-9.

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Tirado, Jorge D., David Acevedo, Richard L. Bretz et Hector D. Abruna. « Adsorption Dynamics of Electroactive Self-Assembling Molecules ». Langmuir 10, n^o 6 (juin 1994) : 1971–79. http://dx.doi.org/10.1021/la00018a057.

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Yamamoto, Yohei. « Electroactive Nanotubes from π-Conjugated Discotic Molecules ». Bulletin of the Chemical Society of Japan 84, n^o 1 (15 janvier 2011) : 17–25. http://dx.doi.org/10.1246/bcsj.20100272.

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Clair, Sean, et Michael R. Norris. « Strategy for functionalization of electrodes with discrete, unmodified small molecules exhibiting aqueous stability ». Journal of Materials Chemistry A 8, n^o 31 (2020) : 15681–86. http://dx.doi.org/10.1039/d0ta03785k.

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Rybakiewicz, Renata, Łukasz Skórka et Roman Gańczarczyk. « Dithienopyrrole-based Organic Electroactive Materials and Their Photovoltaic Aspects ». Current Organic Chemistry 24, n^o 23 (28 décembre 2020) : 2695–736. http://dx.doi.org/10.2174/1385272824999201014154321.

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4H-dithieno[3,2-b:2',3'-d]pyrrole has recently become a useful building block in the synthesis of donor-acceptor molecules with practical application in various organic technologies. The DTP molecule itself consists of a pyrrole ring with two fused thiophenes providing an alternative for the related dithieno[3,2-b:2′,3′-d]thiophene. Most notably, the significance of DTP-based low- and high-molecular weight species has increased in recent years since, upon proper processing, they allow to improve the performance of many fields of organic electronics. This review is a trial of a brief report on recent advances in modern DTP chemistry with examples of their applications, mostly in the area of organic photovoltaics. The scope of this manuscript was to present the structure-property relationships that had been found together with the development of DTP-based materials.

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Vela, Sonia, José Augusto Berrocal, Carmen Atienza, E. W. Meijer et Nazario Martín. « Mesoscopic helical architectures via self-assembly of porphyrin-based discotic systems ». Chemical Communications 53, n^o 29 (2017) : 4084–87. http://dx.doi.org/10.1039/c7cc01670k.

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Breitwieser, R., M. Marsault, V. Repain, J. Lagoute, C. Chacon, Y. Girard, S. Rousset et al. « Long-range ordered nanodomains of grafted electroactive molecules ». Journal of Chemical Physics 139, n^o 20 (28 novembre 2013) : 204703. http://dx.doi.org/10.1063/1.4830402.

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Pshenichnyuk, S. A., A. V. Kukhto, I. N. Kukhto et N. L. Asfandiarov. « Resonance capture of electrons by electroactive organic molecules ». Russian Journal of Physical Chemistry B 4, n^o 6 (décembre 2010) : 1014–27. http://dx.doi.org/10.1134/s1990793110060205.

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Mecheri, B., G. Gabrielli, L. Piras, L. Ciotti, M. Cocco et G. Caminati. « Immobilization of electroactive molecules in organized thin films ». Materials Science and Engineering : C 22, n^o 2 (décembre 2002) : 307–12. http://dx.doi.org/10.1016/s0928-4931(02)00216-3.

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Ruiz, Constanza, Ángeles Monge, Enrique Gutiérrez-Puebla, Ibon Alkorta, José Elguero, Juan T. López Navarrete, M. Carmen Ruiz Delgado et Berta Gómez-Lor. « Saddle-Shaped Cyclic Indole Tetramers : 3D Electroactive Molecules ». Chemistry - A European Journal 22, n^o 30 (20 juin 2016) : 10651–60. http://dx.doi.org/10.1002/chem.201600932.

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Sarmet, Julien, Fabrice Leroux, Christine Taviot-Gueho, Patrick Gerlach, Camille Douard, Thierry Brousse, Gwenaëlle Toussaint et Philippe Stevens. « Interleaved Electroactive Molecules into LDH Working on Both Electrodes of an Aqueous Battery-Type Device ». Molecules 28, n^o 3 (19 janvier 2023) : 1006. http://dx.doi.org/10.3390/molecules28031006.

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By selecting two electroactive species immobilized in a layered double hydroxide backbone (LDH) host, one able to act as a positive electrode material and the other as a negative one, it was possible to match their capacity to design an innovative energy storage device. Each electrode material is based on electroactive species, riboflavin phosphate (RF) on one side and ferrocene carboxylate (FCm) on the other, both interleaved into a layered double hydroxide (LDH) host structure to avoid any possible molecule migration and instability. The intercalation of the electroactive guest molecules is demonstrated by X-ray diffraction with the observation of an interlayer LDH spacing of about 2 nm in each case. When successfully hosted into LDH interlayer space, the electrochemical behavior of each hybrid assembly was scrutinized separately in aqueous electrolyte to characterize the redox reaction occurring upon cycling and found to be a rapid faradic type. Both electrode materials were placed face to face to achieve a new aqueous battery (16C rate) that provides a first cycle-capacity of about 7 mAh per gram of working electrode material LDH/FCm at 10 mV/s over a voltage window of 2.2 V in 1M sodium acetate, thus validating the hybrid LDH host approach on both electrode materials even if the cyclability of the assembly has not yet been met.

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Vecherskii, Sergei Ivanovich, Maksim Alekseevich Konopel'ko et Nikolai Nikolaevich Batalov. « The equilibrate concentration of the electro-active species in (Li0.62K0.38)2CO3 melt and reaction mechanisms of the oxygen reduction on the gold electrode ». Electrochemical Energetics 11, n^o 3 (2011) : 120–27. http://dx.doi.org/10.18500/1608-4039-2011-11-3-120-127.

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The concentrations of the main components of the (Li0.62K0.38)2CO3 melt have been evaluated by the thermodynamic modeling technique, and the Warburg coefficients of electroactive particles as a function of temperature and CO2/O2 gas mixture composition have been calculated. The same dependences of Warburg coefficient and charge transfer resistance were studied on Au cathode using coulostatic technique. It is shown that O2 ions and O2 molecules are the main electroactive species in the melt. Their relative concentration determines which reaction mechanism dominates.

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Phan Thanh, Hai, Le Tran Thi Ngoc, Mai Truong Thi Cam, Thanh Huynh Thi Minh et Trung Huynh Thi Mien. « Dibenzyl viologgen adlayer functionalzed graphitic surraces using electrochemical approach ». Vietnam Journal of Catalysis and Adsorption 10, n^o 1S (15 octobre 2021) : 14–17. http://dx.doi.org/10.51316/jca.2021.083.

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In this contribution, the electrochemciacl deposition method is used to synthesize uncharged dibenzyl viologen (DBV0) firm on HOPG surface. Electrochemical property and surface structure of the molecular adlayer are characterized by employing a combination of cyclic voltammetry (CV) and scanning electron microscope (SEM). Consequently, the DBV0 molecules generated from the reduction of the corresponding DBV2+ molecules at the solid/liqid interface by applying suitable electrochemical potentials are able to physisorb and form a physisorbed adlayer on HOPG. The existence of the DBV0 adlayer on HOPG surface is also confirmed by its blocking effect with respect to the electron transfer at the interface of electroactive [Fe(CN)6]2+ molecules.

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Mas-Torrent, M., C. Rovira et J. Veciana. « Surface-Confined Electroactive Molecules for Multistate Charge Storage Information ». Advanced Materials 25, n^o 3 (23 juillet 2012) : 462–68. http://dx.doi.org/10.1002/adma.201201510.

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Yamamoto, Yohei. « ChemInform Abstract : Electroactive Nanotubes from π-Conjugated Discotic Molecules ». ChemInform 42, n^o 17 (31 mars 2011) : no. http://dx.doi.org/10.1002/chin.201117224.

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Souto, Manuel, Joaquín Calbo, Samuel Mañas-Valero, Aron Walsh et Guillermo Mínguez Espallargas. « Charge-transfer interactions between fullerenes and a mesoporous tetrathiafulvalene-based metal–organic framework ». Beilstein Journal of Nanotechnology 10 (18 septembre 2019) : 1883–93. http://dx.doi.org/10.3762/bjnano.10.183.

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The design of metal–organic frameworks (MOFs) incorporating electroactive guest molecules in the pores has become a subject of great interest in order to obtain additional electrical functionalities within the framework while maintaining porosity. Understanding the charge-transfer (CT) process between the framework and the guest molecules is a crucial step towards the design of new electroactive MOFs. Herein, we present the encapsulation of fullerenes (C60) in a mesoporous tetrathiafulvalene (TTF)-based MOF. The CT process between the electron-acceptor C60 guest and the electron-donor TTF ligand is studied in detail by means of different spectroscopic techniques and density functional theory (DFT) calculations. Importantly, gas sorption measurements demonstrate that sorption capacity is maintained after encapsulation of fullerenes, whereas the electrical conductivity is increased by two orders of magnitude due to the CT interactions between C60 and the TTF-based framework.

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Fujisaki, Masahiro, Ryoya Naito, Takashi Shirahata, Yoshitaka Kawasugi, Naoya Tajima et Yohji Misaki. « Molecular Conductors Based on Dimethylcyclohexene-Fused Tetrathiafulvalene ». Chemistry 6, n^o 6 (25 novembre 2024) : 1509–22. http://dx.doi.org/10.3390/chemistry6060091.

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Chiral electroactive materials have attracted attention for the effects of electrical magnetochiral anisotropy (eMChA) and chirality-induced spin selectivity (CISS). The combination of tetrathiafulvalene (TTF) with chiral moieties is one way to access chiral electroactive materials. In this paper, we have focused on the fused 2,3-dimethylcyclohexene (DMCh) ring as a substituent with chiral carbon atoms and without heteroatoms, which has not been used in the field of molecular conductors, and we synthesized a new TTF derivative (rac-DMCh-EDT-TTF). We have developed novel molecular conductors (rac-DMCh-EDT-TTF)2X (X− = PF6−, AsF6− and ClO4−), which have bilayer conducting sheets composed of the two crystallographically independent molecules. All salts exhibited semiconducting behavior from room temperature down to low temperatures, and a resistivity anomaly was observed at 180–250 K. X-ray structure analysis at 100 K and 263 K and molecular orbital calculations using the results of X-ray structure analysis indicated the emergence of a charge disproportionation between Layers 1 and 2 at the low-temperature phase.

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Krukiewicz, Katarzyna, et Jean-Christophe Lacroix. « Preface : Electroactive conjugated molecules and macromolecules in bioelectrochemistry and biosensing ». Synthetic Metals 296 (juillet 2023) : 117382. http://dx.doi.org/10.1016/j.synthmet.2023.117382.

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Weese-Myers, Moriah E., et Ashley E. Ross. « Characterization of Electroactive Amino Acids with Fast-Scan Cyclic Voltammetry ». Journal of The Electrochemical Society 168, n^o 12 (1 décembre 2021) : 126524. http://dx.doi.org/10.1149/1945-7111/ac4187.

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Small molecules and signaling peptides are extensively involved in controlling basic brain function. While classical neurotransmitters can be detected with a variety of techniques, methods for measurement of rapidly-released neuropeptides remain underdeveloped. Fast-scan cyclic voltammetry (FSCV) is an electrochemical technique often used for subsecond detection of small molecule neurotransmitters, in vivo. A few peptides have been detected with FSCV; however, a detailed analysis of the electrochemical signature of all electroactive amino acids with FSCV has not been fully investigated. Because the mechanisms, locations, and timescales for signaling peptide release in the brain are relatively unexplored, developing sensitive and selective tools capable of quantitating neuropeptide signaling is essential. To bridge this gap, we used FSCV to characterize the electroactive amino acids: cysteine, methionine, histidine, tryptophan, and tyrosine. We show that tyrosine, tryptophan, and histidine are easily oxidized on carbon fiber surfaces with FSCV, while detection of the sulfur-containing amino acids is more difficult. This study provides critical information for electrochemical waveform design and optimization for detection of peptides containing these amino acids.

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Mecheri, B., L. Piras, L. Ciotti et G. Caminati. « Electrode Coating With Ultrathin Films Containing Electroactive Molecules for Biosensor Applications ». IEEE Sensors Journal 4, n^o 2 (avril 2004) : 171–79. http://dx.doi.org/10.1109/jsen.2004.823675.

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Lee, W. R., Y. Kim, J. Y. Kim, T. H. Kim, K. D. Ahn et E. Kim. « Electro-fluorescence Switching of Bis-imidazolium onic Liquids ». Journal of Nanoscience and Nanotechnology 8, n^o 9 (1 septembre 2008) : 4630–34. http://dx.doi.org/10.1166/jnn.2008.ic50.

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Room-temperature ionic liquids (RTILs) containing bis-imidazolium salts were explored to control their optical properties of them in an organic device. The neat bis-imidazolium salts showed ionic conductivity of 3.5 × 10−4 S/cm at room-temperature and the electrochemical window was exhibited within ±2.5 V in a two electrode cell. The bis-imidazolium salts were transparent yellow and showed fluorescence upon excitation with light in the range of 360 to 500 nm. A two electrode organic ionic liquid cell was fabricated using a mixture of PEO200BIm-TFSI and electroactive molecules to control the emission property of the ionic liquid by electrochemical methods. The first example of the ionic liquid containing electro-fluorescence switch was explored with an electroactive benzyl viologen (BzV) blend of bis-imidazolium ionic liquid.

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Echeverry, Carlos A., Alexis Tigreros, Alejandro Ortiz, Braulio Insuasty et Nazario Martín. « Free-base tetraarylporphyrin covalently linked to [60]fullerene through ethynylfluorene spacer ». Journal of Porphyrins and Phthalocyanines 15, n^o 11n12 (novembre 2011) : 1231–38. http://dx.doi.org/10.1142/s1088424611004257.

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The synthesis, structural and electronic characterization of novel electroactive systems based on porphyrin-fullerene in which the chromophores are linked by an ethynylfluorene spacer unit is reported. Sonogashira couplings have been used in short and efficient sequences to give access to these new molecules on a practical scale. The absorption studies, voltamperometric measurements and theoretical calculations at DFT level reveal the push-pull behavior for these systems.

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Hong, Daewha, Kyungtae Kang, Seok-Pyo Hong, Hyun Kyong Shon, Jin Gyeong Son, Tae Geol Lee et Insung S. Choi. « Electrochemical Release of Amine Molecules from Carbamate-Based, Electroactive Self-Assembled Monolayers ». Langmuir 28, n^o 1 (2 décembre 2011) : 17–21. http://dx.doi.org/10.1021/la203420h.

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Yamamoto, Yohei. « Programmed self-assembly of largeπ-conjugated molecules into electroactive one-dimensional nanostructures ». Science and Technology of Advanced Materials 13, n^o 3 (13 juin 2012) : 033001. http://dx.doi.org/10.1088/1468-6996/13/3/033001.

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Pineda Flores, Sergio D., Geoffrey C. Martin-Noble, Richard L. Phillips et Joshua Schrier. « Bio-Inspired Electroactive Organic Molecules for Aqueous Redox Flow Batteries. 1. Thiophenoquinones ». Journal of Physical Chemistry C 119, n^o 38 (16 septembre 2015) : 21800–21809. http://dx.doi.org/10.1021/acs.jpcc.5b05346.

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Gorman, Christopher B., Brandon L. Parkhurst, Wendy Y. Su et Kang-Yi Chen. « Encapsulated Electroactive Molecules Based upon an Inorganic Cluster Surrounded by Dendron Ligands ». Journal of the American Chemical Society 119, n^o 5 (février 1997) : 1141–42. http://dx.doi.org/10.1021/ja963541q.

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Zhang, Jie, He Liu, Yan Zhang, Bo Fu, Chao Zhang, Minhua Cui, Ping Wu et Chongjun Chen. « Enhanced CO2 Reduction by Electron Shuttle Molecules via Coupling Different Electron Transport Processes in Microbial Electrosynthesis ». Fermentation 9, n^o 7 (19 juillet 2023) : 679. http://dx.doi.org/10.3390/fermentation9070679.

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Electron shuttling molecules (ESMs) have been proven to accelerate the electron transfer from the electrode to the electroactive microorganism in microbial electrosynthesis (MES) for higher CO2 reduction or chemical production rate. However, the microbial electron acceptors of electroactive microorganisms and their responses to different electron shuttling molecules in MES were still unknown. In this study, three kinds of ESMs, e.g., riboflavin (B2), methyl viologen (MV) and neutral red (NR) were applied in the MES for acetate production to explore the mechanism of different ESMs on microbial interactions. The acetate concentrations were 41% and 51% higher than that of the control in B2 and NR addition. The acetogens relative abundances of control, B2, MV and NR were 0.29%, 5.68%, 22.78% and 42.89%, respectively. The microbial function profile of the microbial community on the biocathodes indicated that the performance of acetate production was more closely related to the expression of electron transport. The B2 was coupled with the NADH complex and hydrogenase, while MV and NR were coupled with the Rnf complex to support electron transfer and energy conversion via various electron transfer pathways. The study revealed that the ESMs coupled with different electron transport complexes of microorganisms to achieve electron transfer, resulting in product changes.

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Kitamura, An, et Christian Malapit. « Enabling Two-Electron Redox Systems for Energy-Dense Organic-Based Flow Batteries ». ECS Meeting Abstracts MA2024-02, n^o 9 (22 novembre 2024) : 1266. https://doi.org/10.1149/ma2024-0291266mtgabs.

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Redox flow batteries (RFBs) have emerged as a promising grid-scale energy storage technology to meet increasing energy demands. In RFBs, the electroactive materials are in solution stored in external tanks. This separation of the electrode from the electroactive material allows them to be scalable for large-scale operation. Current RFBs use Vanadium as the active material (VRFB). Despite its ability to provide long-duration cycling, VRFBs are limited by the high cost of vanadium and low energy density. To address this issue, organic-based redox flow batteries (ORFB) have gained attention to replace Vanadium. Redox-active organic molecules (ROMs) based on abundant organic structures could reduce costs and offer the possibility to access greater energy densities. As the energy density is proportional to the number of electrons transferred per molecule, ROMs that display two redox-active behaviors can double the electron concentration and energy density. However, multi-electron ROMs are underexplored compared to one-electron systems due to their challenging discovery and synthesis. To advance the class of such systems, structurally simple and abundant dicarbonyl-based compounds were investigated as two-electron negative ROMs. N-Methylphthalimide (N-MePh), a 1,3-dicarbonyl compound, has previously been used as a one-electron ROM, but the instability of the dianion has inhibited its use as a two-electron ROM. A molecular engineering approach was taken to stabilize the dianion and enable two-electron capacity cycling of N-MePh derivatives. Additional dicarbonyl-based compounds are under further investigation to expand the library of multi-electron ROMs for ORFBs. Figure 1

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Kim, Pankyu, Hyeongkwon Moon et Jun Hui Park. « Electrochemical Detection of Surfactant-Encapsulated Aqueous Nanodroplets in Organic Solution ». Chemosensors 11, n^o 2 (3 février 2023) : 112. http://dx.doi.org/10.3390/chemosensors11020112.

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We report enhanced electrochemical detection of single water-in-oil emulsion droplets using the nano-impact method. To detect the emulsion droplets, the water molecules in the droplets were directly oxidized (i.e., water splitting) without additional electroactive species when the droplets collided with the ultramicroelectrode. The water molecules in the emulsion droplet cannot be directly electrolyzed in an organic solvent because the emulsifier does not require a hydrophobic electrolyte. To enhance the signal intensity, the electrochemistry of sub-microscale single droplets was investigated considering the charge neutrality and limiting reagent. Therefore, effective electrolysis of the droplets was achieved. Approximately 10% of water molecules in the droplet (55.6 M H2O) were oxidized based on calculations from the electrochemical peak analysis and DLS measurements.

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Jiao, Jieying, Miao Yu, Dewey Holten, Jonathan S. Lindsey et David F. Bocian. « Characterization of Hydroporphyrins Covalently Attached to Si(100) ». Journal of Porphyrins and Phthalocyanines 21, n^o 07n08 (juillet 2017) : 453–64. http://dx.doi.org/10.1142/s1088424617500547.

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Attachment of synthetic analogs of natural tetrapyrroles to electroactive surfaces enables physicochemical interrogation and may provide material for use in catalysis, diagnostics, and energy conversion. Six synthetic zinc chlorins and one free base bacteriochlorin, tailored analogs of chlorophyll and bacteriochlorophyll, respectively, have been attached to Si(100) via a high-temperature (400°C) baking method. The hydroporphyrins bear diverse functional groups that enable surface attachment (vinyl, acetyl, triisopropylsilylethynyl, pentafluorophenyl, and hydroxymethylphenyl) and a geminal dimethyl group in each reduced ring for stabilization toward adventitious dehydrogenation. The films were examined by cyclic voltammetry, FTIR spectroscopy, X-ray photoelectron spectroscopy, and ellipsometry. Monofunctionalized and difunctionalized hydroporphyrins gave monolayer and multilayer films, respectively, indicating robustness of the hydroporphyrin molecules, but in each case the film was more heterogeneous than observed with comparable porphyrins. The data suggest that some amount of unattached molecules remain intercalated with surface-attached molecules. Additional molecular designs will need to be examined to develop a deep understanding of the structure-activity relationship for formation of homogeneous monolayers and multilayers of synthetic hydroporphyrins.

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Konev, Dmitry V., Olga I. Istakova et Mikhail A. Vorotyntsev. « Electrochemical Measurement of Interfacial Distribution and Diffusion Coefficients of Electroactive Species for Ion-Exchange Membranes : Application to Br2/Br− Redox Couple ». Membranes 12, n^o 11 (26 octobre 2022) : 1041. http://dx.doi.org/10.3390/membranes12111041.

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A novel method has been proposed for rapid determination of principal transmembrane transport parameters for solute electroactive co-ions/molecules, in relation to the crossover problem in power sources. It is based on direct measurements of current for the electrode, separated from solution by an ion-exchange membrane, under voltammetric and chronoamperometric regimes. An electroactive reagent is initially distributed within the membrane/solution space under equilibrium. Then, potential change induces its transformation into the product at the electrode under the diffusion-limited regime. For the chronoamperometric experiment, the electrode potential steps backward after the current stabilization, thus inducing an opposite redox transformation. Novel analytical solutions for nonstationary concentrations and current have been derived for such two-stage regime. The comparison of theoretical predictions with experimental data for the Br2/Br− redox couple (where only Br− is initially present) has provided the diffusion coefficients of the Br− and Br2 species inside the membrane, D(Br−) = (2.98 ± 0.27) 10−6 cm2/s and D(Br2) = (1.10 ± 0.07) 10−6 cm2/s, and the distribution coefficient of the Br− species at the membrane/solution boundary, K(Br-) = 0.190 ± 0.005, for various HBr additions (0.125–0.75 M) to aqueous 2 M H2SO4 solution. This possibility to determine transport characteristics of two electroactive species, the initial solute component and its redox product, within a single experiment, represents a unique feature of this study.

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Magaldi, Diego, Maria Ulfa, Sébastien Péralta, Fabrice Goubard, Thierry Pauporté et Thanh-Tuân Bui. « Carbazole Electroactive Amorphous Molecular Material : Molecular Design, Synthesis, Characterization and Application in Perovskite Solar Cells ». Energies 13, n^o 11 (5 juin 2020) : 2897. http://dx.doi.org/10.3390/en13112897.

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In perovskite photovoltaics (PSCs), the role of the hole transporting material (HTM) is highly important as it significantly influents to the global device’s performance and stability. Hole transporter ensures the extraction of hole at the perovskite/HTM interface and transport it towards the cathode. Thus, accurate molecular design affording to efficient and cost-effective HTM is of major interest. Small molecules having glass forming property is an attractive class as it can form morphologically stable thin film. Herein, a carbazole molecular glass bearing a polymerizable function was designed and synthetized. Its characteristics are suitable for application as HTM in PSCs. The preliminary photovoltaic application lead to device efficiency of 14–15% depending on the chemical composition of the perovskite employed. These promising results open the way to design new alternative molecular and polymeric HTMs suitable for solution processed hybrid solar cells.

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Deng, Dehua, Yong Chang, Wenjing Liu, Mingwei Ren, Ning Xia et Yuanqiang Hao. « Advancements in Biosensors Based on the Assembles of Small Organic Molecules and Peptides ». Biosensors 13, n^o 8 (29 juillet 2023) : 773. http://dx.doi.org/10.3390/bios13080773.

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Over the past few decades, molecular self-assembly has witnessed tremendous progress in a variety of biosensing and biomedical applications. In particular, self-assembled nanostructures of small organic molecules and peptides with intriguing characteristics (e.g., structure tailoring, facile processability, and excellent biocompatibility) have shown outstanding potential in the development of various biosensors. In this review, we introduced the unique properties of self-assembled nanostructures with small organic molecules and peptides for biosensing applications. We first discussed the applications of such nanostructures in electrochemical biosensors as electrode supports for enzymes and cells and as signal labels with a large number of electroactive units for signal amplification. Secondly, the utilization of fluorescent nanomaterials by self-assembled dyes or peptides was introduced. Thereinto, typical examples based on target-responsive aggregation-induced emission and decomposition-induced fluorescent enhancement were discussed. Finally, the applications of self-assembled nanomaterials in the colorimetric assays were summarized. We also briefly addressed the challenges and future prospects of biosensors based on self-assembled nanostructures.

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Mejías, Sara H., Javier López-Andarias, Tsuneaki Sakurai, Satoru Yoneda, Kevin P. Erazo, Shu Seki, Carmen Atienza, Nazario Martín et Aitziber L. Cortajarena. « Repeat protein scaffolds : ordering photo- and electroactive molecules in solution and solid state ». Chemical Science 7, n^o 8 (2016) : 4842–47. http://dx.doi.org/10.1039/c6sc01306f.

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An innovative approach is investigated in which a protein building block is designed to organize porphyrin molecules. The strategy is based on a modular protein unit with tunable properties including stability, function and self-assembly.

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Schmidt, Izabela, Jieying Jiao, David F. Bocian et Jonathan S. Lindsey. « A Bipodal-Tethered Porphyrin for Attachment to Silicon Surfaces in Studies of Molecular Information Storage ». Journal of Nanoscience and Nanotechnology 8, n^o 9 (1 septembre 2008) : 4813–17. http://dx.doi.org/10.1166/jnn.2008.ic85.

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An approach for molecular information storage entails use of redox-active molecules attached to an electroactive surface. Understanding the structural features that give rise to robust molecular monolayers with high charge density is an essential objective. Toward this goal, a zinc-porphyrin bearing an all-carbon bipodal tether, 5-(1,6-heptadien-4-yl)-15-phenyl-10,20-di-p-tolylporphinatozinc(II), has been synthesized by the reaction of a dipyrromethane and a dipyrromethane-1,9-dicarbinol. The porphyrin was attached to Si(100) via a high temperature procedure. The resulting molecular monolayers exhibited surface coverages, adsorption geometries, electron-transfer rates, and stabilities under repeated electrochemical cycling that are similar to those obtained with monopodal carbon tethers. The observation that the bipodal anchor does not provide enhanced stability is surprising given that attachment is achieved via two versus one covalent linkage.

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Messmore, Benjamin W., James F. Hulvat, Eli D. Sone et Samuel I. Stupp. « Synthesis, Self-Assembly, and Characterization of Supramolecular Polymers from Electroactive Dendron Rodcoil Molecules ». Journal of the American Chemical Society 126, n^o 44 (novembre 2004) : 14452–58. http://dx.doi.org/10.1021/ja049325w.

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Sharma, Jadab, et Kunjukrishna P. Vijayamohanan. « Organic dye molecules as reducing agent for the synthesis of electroactive gold nanoplates ». Journal of Colloid and Interface Science 298, n^o 2 (juin 2006) : 679–84. http://dx.doi.org/10.1016/j.jcis.2005.12.048.

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Tendero, María José L., Angel Benito, Juan Cano, Jose Manuel Lloris, Ramón Martínez-Máñez, Juan Soto, Andrew J. Edwards, Paul R. Raithby et Moira A. Rennie. « Host molecules containing electroactive cavities obtained by the molecular assembly of redox-active ligands and metal ions ». J. Chem. Soc., Chem. Commun., n^o 16 (1995) : 1643–44. http://dx.doi.org/10.1039/c39950001643.

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Boubezari, Imane, Ali Zazoua, Abdelhamid Errachid et Nicole Jaffrezic-Renault. « Sensitive Electrochemical Detection of Bioactive Molecules (Hydrogen Peroxide, Glucose, Dopamine) with Perovskites-Based Sensors ». Chemosensors 9, n^o 10 (12 octobre 2021) : 289. http://dx.doi.org/10.3390/chemosensors9100289.

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Perovskite-modified electrodes have received increasing attention in the last decade, due to their electrocatalytic properties to undergo the sensitive and selective detection of bioactive molecules, such as hydrogen peroxide, glucose, and dopamine. In this review paper, different types of perovskites involved for their electrocatalytic properties are described, and the proposed mechanism of detection is presented. The analytical performances obtained for different electroactive molecules are listed and compared with those in terms of the type of perovskite used, its nanostructuration, and its association with other conductive nanomaterials. The analytical performance obtained with perovskites is shown to be better than those of Ni and Co oxide-based electrochemical sensors. Main trends and future challenges for enlarging and improving the use of perovskite-based electrochemical sensors are then discussed.

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Sun, Yanmei, Li Li et Keying Shi. « Analog and Digital Bipolar Resistive Switching in Co–Al-Layered Double Hydroxide Memristor ». Nanomaterials 10, n^o 11 (22 octobre 2020) : 2095. http://dx.doi.org/10.3390/nano10112095.

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We demonstrate a nonvolatile memristor based on Co–Al-layered double hydroxide (Co–Al LDH). We also introduce a memristor that has a hexazinone-adsorbing Co–Al LDH composite active layer. Memristor characteristics could be modulated by adsorbing hexazinone with Co–Al LDHs in the active layer. While different, Co–Al LDH-based memory devices show gradual current changes, and the memory device with small molecules of adsorbed hexazinone undergo abrupt changes. Both devices demonstrate programmable memory peculiarities. In particular, both memristors show rewritable resistive switching with electrical bistability (>105 s). This research manifests the promising potential of 2D nanocomposite materials for adsorbing electroactive small molecules and rectifying resistive switching properties for memristors, paving a way for design of promising 2D nanocomposite memristors for advanced device applications.

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Sikukuu Nambafu, Gabriel. « Organic molecules as bifunctional electroactive materials for symmetric redox flow batteries : A mini review ». Electrochemistry Communications 127 (juin 2021) : 107052. http://dx.doi.org/10.1016/j.elecom.2021.107052.

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Ackov, Renal B., Laurent Binet, Jean-Marc Fabre, Deborah J. Jones et Jacques Roziere. « Intercalation and Post-synthesis Oxidation of Basic Electroactive TTF-type Molecules in Zirconium Phosphate ». Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 311, n^o 1 (mars 1998) : 239–44. http://dx.doi.org/10.1080/10587259808042392.

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Shi, Gaoquan. « Matrix chain-length dependence of the electrochemistry of electroactive molecules in amorphous polymeric solvents ». Journal of Physical Chemistry 96, n^o 11 (mai 1992) : 4677–79. http://dx.doi.org/10.1021/j100190a097.

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Sandín, Pilar, Angeles Martínez-Grau, Luis Sánchez, Carlos Seoane, Rosendo Pou-Amérigo, Enrique Ortí et Nazario Martín. « The First Spiroconjugated TTF- and TCNQ-Type Molecules : A New Class of Electroactive Systems ? » Organic Letters 7, n^o 2 (janvier 2005) : 295–98. http://dx.doi.org/10.1021/ol047681d.

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Chang, Yong, Jiaxin Lou, Luyao Yang, Miaomiao Liu, Ning Xia et Lin Liu. « Design and Application of Electrochemical Sensors with Metal–Organic Frameworks as the Electrode Materials or Signal Tags ». Nanomaterials 12, n^o 18 (19 septembre 2022) : 3248. http://dx.doi.org/10.3390/nano12183248.

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Metal–organic frameworks (MOFs) with fascinating chemical and physical properties have attracted immense interest from researchers regarding the construction of electrochemical sensors. In this work, we review the most recent advancements of MOF−based electrochemical sensors for the detection of electroactive small molecules and biological macromolecules (e.g., DNA, proteins, and enzymes). The types and functions of MOF−based nanomaterials in terms of the design of electrochemical sensors are also discussed. Furthermore, the limitations and challenges of MOF−based electrochemical sensing devices are explored. This work should be invaluable for the development of MOF−based advanced sensing platforms.

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Shanta, Aysha S., Khandakar A. Al Mamun, Syed K. Islam, Nicole McFarlane et Dale K. Hensley. « Carbon Nanotubes, Nanofibers and Nanospikes for Electrochemical Sensing : A Review ». International Journal of High Speed Electronics and Systems 26, n^o 03 (27 juin 2017) : 1740008. http://dx.doi.org/10.1142/s0129156417400080.

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The structural and material properties of carbon based sensors have spurred their use in biosensing applications. Carbon electrodes are advantageous for electrochemical sensors due to their increased electroactive surface areas, enhanced electron transfer, and increased adsorption of target molecules. The bonding properties of carbon allows it to form a variety of crystal structures. This paper performs a comparative review of carbon nanostructures for electrochemical sensing applications. The review specifically compares carbon nanotubes (CNT), carbon nanofibers (CNF), and carbon nanospikes (CNS). These carbon nanostructures possess defect sites and oxygen functional groups that aid in electron transfer and adsorption processes.

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Yu, Zhang-Yu, De-Sheng Kong, Shu-Xin Wu, Lei Wang et Hanf-Qing Wang. « Electrocatalysis of a SiC particle-modified glassy carbon electrode for the oxidation of adrenaline in a KRPB physiological solution ». Journal of the Serbian Chemical Society 70, n^o 5 (2005) : 745–52. http://dx.doi.org/10.2298/jsc0505745y.

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The electrocatalytic properties of a SiC particle-modified glassy carbon electrode (MGC) for adrenaline oxidation were studied by cyclic voltammetry, double-potential step chronoculometry and electrochemical impedance spectroscopy in a pH 7.4 physiological Kres?Ringer phosphate buffer (KRPB) solution. It was shown that modification of the electrode with SiC particles has a marked electrocatalytic effect on the electrochemical reaction of adrenaline, i.e., the activity and the reversibility of the MGC electrode were significantly improved compared to an unmodified electrode. This was attributed to the adsorption effect of the electroactive adrenaline molecules on the MGC electrode surface. .

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Guo, Bingshu, Zhongai Hu, Yufeng An, Ning An, Pengfei Jia, Yadi Zhang, Yuying Yang et Zhimin Li. « Nitrogen-doped heterostructure carbon functionalized by electroactive organic molecules for asymmetric supercapacitors with high energy density ». RSC Advances 6, n^o 46 (2016) : 40602–14. http://dx.doi.org/10.1039/c6ra07923g.

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The organic molecules (TCBQ, AQ) with multi-electron redox center are selected to modify nitrogen-doped heterostructure carbon (NHC) by noncovalent interaction and the electrode materials show good performances and potential self-matching behaviors.

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