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Artículos de revistas sobre el tema "Metal Substituted"

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Publicado: 6 de septiembre de 2023

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1

Li, Huaxi, Liu Shi, Chengkai Jin, Runping Ye y Rongbin Zhang. "Co and Ni Incorporated γ-Al2O3 (110) Surface: A Density Functional Theory Study". Catalysts 12, n.º 2 (18 de enero de 2022): 111. http://dx.doi.org/10.3390/catal12020111.

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Investigation into the state and mechanisms of the active metal substitution into the γ-Al2O3 support is the basis for design of many catalysts. Periodic density functional theory (DFT) +U calculations were used to investigate the surface properties of transition metals Co3+ and Ni3+ cations substitute for the Al3+ cations of γ-Al2O3 (110) surface. It was found that the substitution energy of one Al3+ substituted by Co3+ and Ni3+ are −61 and −57 kJ/mol, respectively. The Co and Ni preferentially substitute the tetrahedral Al sites instead of the octahedral Al sites. Using thermodynamics, the Al atoms in the top layer of γ-Al2O3 (110) can be 100% substituted by Co and Ni. Ni is easier to substitute the Al atom than Co. There is no obvious structural distortion that occurs after Co and Ni substituted all the top layer Al atoms. While the band gaps of the substituted surface become narrower, resulting in the increase of surface Lewis acidity. In addition, the oxygen vacancy formation energies of the Co and Ni substituted surface are 268 and 53 kJ/mol, respectively. The results provide interface structure and physical chemistry properties of metal-doped catalysts.

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2

Hor, T. S. Andy y Sheh-Mai Chee. "Substituted metal carbonyls". Journal of Organometallic Chemistry 331, n.º 1 (septiembre de 1987): 23–28. http://dx.doi.org/10.1016/s0022-328x(00)98910-1.

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3

Hor, T. S. Andy, Pauline M. N. Low, Yaw Kai Yan, Ling-Kang Liu y Yuh-Sheng Wen. "Substituted metal carbonyls". Journal of Organometallic Chemistry 448, n.º 1-2 (abril de 1993): 131–37. http://dx.doi.org/10.1016/0022-328x(93)80077-o.

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4

Low, Pauline M. N., Y. K. Yan, H. S. O. Chan y T. S. Andy Hor. "Substituted metal carbonyls". Journal of Organometallic Chemistry 454, n.º 1-2 (julio de 1993): 205–9. http://dx.doi.org/10.1016/0022-328x(93)83241-m.

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5

Hor, T. S. Andy. "Substituted metal carbonyls". Journal of Organometallic Chemistry 319, n.º 2 (enero de 1987): 213–17. http://dx.doi.org/10.1016/0022-328x(87)83028-0.

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6

Andy Hor, T. S. y Siti Rohani Bte Rus. "Substituted metal carbonyls". Journal of Organometallic Chemistry 348, n.º 3 (julio de 1988): 343–47. http://dx.doi.org/10.1016/0022-328x(88)80415-7.

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7

Andy Hor, T. S. "Substituted metal carbonyls". Journal of Organometallic Chemistry 340, n.º 1 (febrero de 1988): 51–57. http://dx.doi.org/10.1016/0022-328x(88)80553-9.

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8

Hor, T. S. Andy y Lai-Tee Phang. "Substituted metal carbonyls". Thermochimica Acta 178 (abril de 1991): 287–93. http://dx.doi.org/10.1016/0040-6031(91)80320-i.

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9

Chan, Hardy S. O., T. S. Andy Hor, Lai-Tee Phang y Kuang Lee Tan. "Substituted metal carbonyls". Journal of Organometallic Chemistry 407, n.º 3 (abril de 1991): 353–57. http://dx.doi.org/10.1016/0022-328x(91)86313-f.

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10

Radoczy, T., Kristof Kovacs y N. Sarzo. "Rare Earth Metal Doped Barium Titanates". Materials Science Forum 589 (junio de 2008): 143–48. http://dx.doi.org/10.4028/www.scientific.net/msf.589.143.

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High purity as well as Ce-, Pr- and Y-doped polycrystalline BaTiO3 ceramics were prepared by wet chemical synthesis. Dielectric constant as well as dielectric loss of dry pressed and sintered ceramics show dielectric constant above 20000 for samples containing 0.5 % Ce accompanied by semiconducting properties. X-ray diffraction studies confirmed Ti being substituted by Ce an Y, while Pr substitutes Ba ions.

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11

ZHANG, ZHEN, PING WU, LI LU y CHANG SHU. "ACCEPTOR MODULATED DEFECT AND ELECTRONIC STRUCTURES IN FERROELECTRIC LEAD TITANATE: AN AB INITIO STUDY". Functional Materials Letters 01, n.º 02 (septiembre de 2008): 121–26. http://dx.doi.org/10.1142/s1793604708000228.

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Defects and electronic structures of the aliovalent acceptors substituted lead titanates were studied using density functional theory calculations. Three types of defect structures are identified in 3d transition metal and the group IIB and VB elements substituted systems. Cr substitute and oxygen vacancies are found to be dissociated from each other, forming an isolated point defect structure. In contrast, all other substitutes favor the immobile acceptor–oxygen–vacancy–acceptor defect clusters which weaken the space charge effects by limiting the motions of oxygen vacancies. Furthermore, two distinct defect-cluster structures (along the z direction and in the xy plane, respectively) are observed. We conclude that the defect structure in the xy plane induces head-to-head polarization patterns, which make the domain pinning effects even weaker. The electronic structures due to elements substitutions are also investigated and compared.

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12

Han, Jianwei, Limin Wang, Xiaofei Qian y Bowen Xu. "Potassium tert-Butoxide Mediated Arylation of 2-Substituted Malononitriles Using Diaryliodonium Salts". Synlett 28, n.º 16 (6 de julio de 2017): 2139–42. http://dx.doi.org/10.1055/s-0036-1589061.

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Direct arylation of 2-substituted malononitriles using diaryliodonium salts without involving transition-metal catalysts was developed. By using potassium tert-butoxide as a promoter, the desired 2-substituated α-arylmalononitriles derivatives were synthesized in good to excellent yields of 55–96%. This synthetic method provided an efficient way to prepare a variety of 2-substituted arylmalononitriles which were useful in agrochemicals.

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13

Sharma, Upendra, Inder Kumar y Rakesh Kumar. "Recent Advances in the Regioselective Synthesis of Indoles via C–H Activation/Functionalization". Synthesis 50, n.º 14 (28 de mayo de 2018): 2655–77. http://dx.doi.org/10.1055/s-0037-1609733.

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Indole is an important heterocyclic motif that occurs ubiquitously in bioactive natural products and pharmaceuticals. Immense efforts have been devoted to the synthesis of indoles starting from the Fisher indole synthesis to the recently developed C–H activation/functionalization-based methods. Herein, we have reviewed the progress made on the regioselective synthesis of functionalized indoles, including 2-substituted, 3-substituted and 2,3-disusbstituted indoles, since the year 2010.1 Introduction2 Metal-Catalyzed Synthesis of 2-Substituted Indoles3 Metal-Catalyzed Synthesis of 3-Substituted Indoles4 Metal-Free Synthesis of 3-Substituted Indoles5 Metal-Catalyzed 2,3-Disubstituted Indole Synthesis5.1 Metal-Catalyzed Intramolecular 2,3-Disubstituted Indole Synthesis5.2 Metal-Catalyzed Intermolecular 2,3-Disubstituted Indole Synthesis6 Metal-Free 2,3-Disubstituted Indole Synthesis6.1 N-Protected 2,3-Disubstituted Indole Synthesis6.2 N-Unprotected 2,3-Disubstituted Indole Synthesis7 Applications8 Summary and Outlook

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14

Yamaguchi, K., J. Dong, R. A. Scott, M. Pearson, P. A. Karplus, J. McCracken y R. P. Hausinger. "Characterization of metal-substituted ureases". Journal of Inorganic Biochemistry 67, n.º 1-4 (julio de 1997): 188. http://dx.doi.org/10.1016/s0162-0134(97)80065-7.

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15

Shaposhnikov, G. P., V. E. Maizlish y V. P. Kulinich. "Carboxy-substituted Phthalocyanine Metal Complexes". Russian Journal of General Chemistry 75, n.º 9 (septiembre de 2005): 1480–88. http://dx.doi.org/10.1007/s11176-005-0450-4.

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16

Taqui Khan, Badar y S. M. Zakeeruddin. "Metal complexes of substituted pyrimidines". Inorganica Chimica Acta 124, n.º 1 (mayo de 1986): 5–11. http://dx.doi.org/10.1016/s0020-1693(00)82079-4.

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17

Giovanoli, Rudolf y Rochelle M. Cornell. "Crystallization of Metal Substituted Ferrihydrites". Zeitschrift für Pflanzenernährung und Bodenkunde 155, n.º 5 (1992): 455–60. http://dx.doi.org/10.1002/jpln.19921550517.

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18

Kaur, N., B. Singh y B. J. Kennedy. "Copper substitution alone and in the presence of chromium, zinc, cadmium and lead in goethite (α-FeOOH)". Clay Minerals 44, n.º 3 (septiembre de 2009): 293–310. http://dx.doi.org/10.1180/claymin.2009.044.3.293.

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AbstractA series of Cu-substituted goethites, single and co-substituted with Cr, Zn, Cd and/or Pb was prepared, having molar ratios equal to 2.00, 3.33 and 5.00 mol%. All the samples contained only goethite, except Cu-, (Cu,Zn)- and (Cu,Pb)-samples synthesized at 5.00 mol% where hematite was also formed. The presence of Cr/Cd suppressed the hematite-forming effects of Cu. The general sequence of metal entry into the single-metal-substituted goethites was Zn = Cr > Cd > Cu > Pb and in di- (5.00 mol%) and tri- (3.33 mol%) metal-substituted goethites was Cu > Zn > Cd > Cr >> Pb. Cu incorporation increased all the unit-cell parameters in single-metal-substituted goethite, and these parameters increased in combination with other metals as follows: Cd > Zn > Cr > Pb in the multimetal-substituted goethites. The Cu-substituted goethite dissolved faster than pure goethite. Co substitutions of Cr/Pb reduced the dissolution rate (kFe), while substitutions of Cd/Zn increased kFe.

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19

Yang, Shuibo, Bin Sun, Zhongping Ou, Deying Meng, Guifen Lu, Yuanyuan Fang y Karl M. Kadish. "β-Nitro-substituted free-base, iron(III) and manganese(III) tetraarylporphyrins: synthesis, electrochemistry and effect of the NO2 substituent on spectra and redox potentials in non-aqueous media". Journal of Porphyrins and Phthalocyanines 17, n.º 08n09 (agosto de 2013): 857–69. http://dx.doi.org/10.1142/s1088424613500612.

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Two free-base and four metal derivatives of substituted tetraarylporphyrins containing a nitro-substituent on the β-pyrrole position of the macrocycle were synthesized and characterized by UV-vis, FTIR, 1 H NMR and mass spectrometry as well as electrochemistry and spectroelectrochemistry in non-aqueous media. The porphyrins are represented as ( NO 2 TmPP ) M and ( NO 2 TdmPP ) M , where M = 2 H , Fe III Cl or Mn III Cl , m is a CH 3 group on the para-position of the four meso-phenyl rings of the tetraphenylporphyrin (TPP) and dm represents two OCH 3 substituents on the meta-positions of each phenyl ring of the TPP macrocycle. UV-visible spectra of the nitro-substituted porphyrins exhibit absorption bands which are red-shifted by 4–11 nm as compared to bands of the same substituted tetraarylporphyrins lacking a nitro substituent. Three or four reductions are observed for each iron and manganese nitroporphyrin, the first of which is metal-centered, leading to formation of an Fe ( II ) or Mn ( II ) complex. Further reduction at the metal center occurs for the iron porphyrins but this reaction proceeds via an Fe ( II ) π anion radical in the case of the two nitro-substituented derivatives. The β-nitro-substituted porphyrins are easier to reduce and harder to oxidize than the corresponding compounds lacking a nitro group. The effect of NO 2 substituent on reduction/oxidation potentials and the site of electron transfer was also discussed.

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20

Fukasawa, Kayoko M., Toshiyuki Hata, Yukio Ono y Junzo Hirose. "Metal Preferences of Zinc-Binding Motif on Metalloproteases". Journal of Amino Acids 2011 (11 de mayo de 2011): 1–7. http://dx.doi.org/10.4061/2011/574816.

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Almost all naturally occurring metalloproteases are monozinc enzymes. The zinc in any number of zinc metalloproteases has been substituted by some other divalent cation. Almost all Co(II)- or Mn(II)-substituted enzymes maintain the catalytic activity of their zinc counterparts. However, in the case of Cu(II) substitution of zinc proteases, a great number of enzymes are not active, for example, thermolysin, carboxypeptidase A, endopeptidase from Lactococcus lactis, or aminopeptidase B, while some do have catalytic activity, for example, astacin (37%) and DPP III (100%). Based on structural studies of various metal-substituted enzymes, for example, thermolysin, astacin, aminopeptidase B, dipeptidyl peptidase (DPP) III, and del-DPP III, the metal coordination geometries of both active and inactive Cu(II)-substituted enzymes are shown to be the same as those of the wild-type Zn(II) enzymes. Therefore, the enzyme activity of a copper-ion-substituted zinc metalloprotease may depend on the flexibility of catalytic domain.

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21

Wang, Chao y Zhenfeng Xi. "Metal mediated synthesis of substituted cyclooctatetraenes". Chemical Communications, n.º 48 (2007): 5119. http://dx.doi.org/10.1039/b709839a.

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22

Wells, M. A., R. W. Fitzpatrick, R. J. Gilkes y J. Dobson. "Magnetic properties of metal-substituted haematite". Geophysical Journal International 138, n.º 2 (agosto de 1999): 571–80. http://dx.doi.org/10.1046/j.1365-246x.1999.00840.x.

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23

Eberhardt, Wolfgang y Michael Hanack. "Synthesis of Hexadecaalkyl-Substituted Metal Phthalocyanines". Synthesis 1998, n.º 12 (diciembre de 1998): 1760–64. http://dx.doi.org/10.1055/s-1998-2218.

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24

Occhipinti, Giovanni, Hans-René Bjørsvik, Karl Wilhelm Törnroos, Alois Fürstner y Vidar R. Jensen. "The First Imidazolium-Substituted Metal Alkylidene". Organometallics 26, n.º 18 (agosto de 2007): 4383–85. http://dx.doi.org/10.1021/om700590v.

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25

Takahashi, Masae y Yoshiyuki Kawazoe. "Metal-Substituted Disilynes with Linear Forms". Organometallics 27, n.º 19 (13 de octubre de 2008): 4829–32. http://dx.doi.org/10.1021/om800469w.

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26

Siedle, A. R., P. A. Lyon, S. L. Hunt y R. P. Skarjune. "Aryl-substituted molecular metal oxide clusters". Journal of the American Chemical Society 108, n.º 20 (octubre de 1986): 6430–31. http://dx.doi.org/10.1021/ja00280a074.

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27

Lancellotti, L., R. Tubino, S. Luzzati, E. Licandro, S. Maiorana y A. Papagni. "Spectroscopy of transition-metal substituted oligothiophenes". Synthetic Metals 93, n.º 1 (febrero de 1998): 27–32. http://dx.doi.org/10.1016/s0379-6779(98)80128-8.

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28

Kolesnik, S., B. Dabrowski y RE Cook. "Microanalysis of Transition Metal Substituted ZnO". Microscopy and Microanalysis 12, S02 (31 de julio de 2006): 882–83. http://dx.doi.org/10.1017/s1431927606063835.

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29

Schneemeyer, L. F., S. E. Spengler, J. V. Waszczak y F. J. Disalvo. "New transition metal substituted cadmium tellurides". Materials Letters 4, n.º 3 (abril de 1986): 121–24. http://dx.doi.org/10.1016/0167-577x(86)90001-7.

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30

Youn, So Won y Tae Yun Ko. "Metal-Catalyzed Synthesis of Substituted Indoles". Asian Journal of Organic Chemistry 7, n.º 8 (3 de julio de 2018): 1467–87. http://dx.doi.org/10.1002/ajoc.201800290.

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31

Kolesnik, S., B. Dabrowski y J. Mais. "Magnetism in transition metal substituted ZnO". physica status solidi (c) 1, n.º 4 (5 de febrero de 2004): 900–903. http://dx.doi.org/10.1002/pssc.200304230.

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32

Roh, Y., H. Vali, T. J. Phelps y J. W. Moon. "Extracellular Synthesis of Magnetite and Metal-Substituted Magnetite Nanoparticles". Journal of Nanoscience and Nanotechnology 6, n.º 11 (1 de noviembre de 2006): 3517–20. http://dx.doi.org/10.1166/jnn.2006.17973.

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We have developed a novel microbial process that exploits the ability of Fe(III)-reducing microorganisms to produce copious amounts of extracellular magentites and metal-substituted magnetite nanoparticles. The Fe(III)-reducing bacteria (Theroanaerobacter ethanolicus and Shewanella sp.) have the ability to reduce Fe(III) and various metals in aqueous media and form various sized magnetite and metal-substituted magnetite nano-crystals. The Fe(III)-reducing bacteria formed metal-substituted magnetites using iron oxide plus metals (e.g., Co, Cr, Mn, Ni) under conditions of relatively low temperature (<70 °C), ambient pressure, and pH values near neutral to slightly basic (pH = 6.5 to 9). Precise biological control over activation and regulation of the biosolid-state processes can produce magnetite particles of well-defined size (typically tens of nanometers) and crystallographic morphology, containing selected dopant metals into the magnetite (Fe3−yXyO4) structure (where X = Co, Cr, Mn, Ni). Magnetite yields of up to 20 g/L per day have been observed in 20-L vessels. Water-based ferrofluids were formed with the nanometer sized, magnetite, and metal-substituted biomagnetite particles.

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33

Sampson, M. D., J. S. Park, R. D. Schaller, M. K. Y. Chan y A. B. F. Martinson. "Transition metal-substituted lead halide perovskite absorbers". Journal of Materials Chemistry A 5, n.º 7 (2017): 3578–88. http://dx.doi.org/10.1039/c6ta09745f.

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34

Bansal, C., H. Kawanaka, R. Takahashi y Y. Nishihara. "Metal–insulator transition in Fe-substituted SrRuO3 bad metal system". Journal of Alloys and Compounds 360, n.º 1-2 (octubre de 2003): 47–53. http://dx.doi.org/10.1016/s0925-8388(03)00333-5.

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35

Lear, Yvonne y Tony Durst. "Synthesis of regiospecifically substituted 2-hydroxybenzocyclobutenones". Canadian Journal of Chemistry 75, n.º 6 (1 de junio de 1997): 817–24. http://dx.doi.org/10.1139/v97-098.

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Regiospecifically substituted 2-hydroxybenzocyclobutenones were synthesized from the corresponding TBS protected 2-bromo-mandelate esters via halogen–metal exchange, cyclization, and subsequent deprotection. Keywords: 2-hydroxybenzocyclobutenones, halogen–metal exchange, benzocyclobutenediones, 2-bromomandelate esters.

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36

Takenaga, Naoko, Toshitaka Shoji, Takayuki Menjo, Akiko Hirai, Shohei Ueda, Kotaro Kikushima, Tomonori Hanasaki y Toshifumi Dohi. "Nucleophilic Arylation of Halopurines Facilitated by Brønsted Acid in Fluoroalcohol". Molecules 24, n.º 21 (23 de octubre de 2019): 3812. http://dx.doi.org/10.3390/molecules24213812.

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Various aryl-substituted purine derivatives were synthesized through the direct arylation of halopurines with aromatic compounds, facilitated by the combination of triflic acid and fluoroalcohol. This metal-free method is complementary to conventional coupling reactions using metal catalysts and reagents for the syntheses of aryl-substituted purine analogues.

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37

Guo, Xue, Li, Li, Song, Niu, Liu, Mai, Zhang y Guo. "Effects of Transition Metal Substituents on Interfacial and Electronic Structure of CH3NH3PbI3/TiO2 Interface: A First-Principles Comparative Study". Nanomaterials 9, n.º 7 (1 de julio de 2019): 966. http://dx.doi.org/10.3390/nano9070966.

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To evaluate the influence of transition metal substituents on the characteristics of CH3NH3PbI3/TiO2, we investigated the geometrical and electronic properties of transition metal-substituted CH3NH3PbI3/TiO2 by first-principles calculations. The results suggested that the substitution of Ti4+ at the five-fold coordinated (Ti5c) sites by transition metals is energetically favored. The substituted interface has enhanced visible light sensitivity and photoelectrocatalytic activity by reducing the transition energies. The transition metal substitution can effectively tune the band gap of the interface, which significantly improves the photo-reactivity. The substituted systems are expected to be more efficient in separating the photo-generated electrons-holes and active in the visible spectrum.

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38

Chen, Dengtai, Xijiang Han, Wen Jin y Bin Zhang. "Metal nanoparticle catalyzed cyclobutane cleavage reaction". RSC Advances 5, n.º 122 (2015): 100722–24. http://dx.doi.org/10.1039/c5ra21225a.

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39

Yang, Peng, Jun Xiao Yang y Guan Jun Chang. "A Metal Coordination Crosslinking Novel High Performance Thermoset". Materials Science Forum 913 (febrero de 2018): 746–51. http://dx.doi.org/10.4028/www.scientific.net/msf.913.746.

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N-substituted crosslinking polybenzimidazole pyridine sulfone, as novel high performance functional polymers, was prepared by the coordination of N-substituted polybenzimidazole pyridine sulfone (Py-N-PBIS) ligand with varying content of metallic ion (Co2+, Ni2+, Zn2+). The structures of the polymers were characterized by means of FT-IR and 1H NMR spectroscopy, and the results showed a good agreement with the proposed structures. TGA measurements exhibited that the crosslinking polymers possessed good thermal stability with high thermal decomposition temperatures (thermally stable up to 405-510 °C). Additionally, the thermal stability of the coordination polymers was improved constantly with the increasing of the content of Co2+, Ni2+ or Zn2+. The metal coordination crosslinking N-substituted polybenzimidazole pyridine sulfone could be considered as a novel high performance thermoset.

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40

Makarova, Elena A., Semyon V. Dudkin y Evgeny A. Lukyanets. "An efficient synthesis of metal-free tetraazachlorinsviaindium complexes". Journal of Porphyrins and Phthalocyanines 17, n.º 08n09 (agosto de 2013): 785–90. http://dx.doi.org/10.1142/s1088424613500338.

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An efficient synthetic route for the preparation of benzene or 1,2-naphthalene fused and phenyl substituted metal-free tetraazachlorins with yields up to 40% was developed using In ( III ) as a removable template. New substituted tribenzotetraazachlorins derivatives with tert-butyl and phenylsulfanyl groups in β and α position of fused benzene rings, correspondingly, were synthesized by novel approach and their spectral properties were investigated.

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41

Aksenov, Alexander V., Alexander N. Smirnov, Nicolai A. Aksenov, Inna V. Aksenova, Jonathon P. Matheny y Michael Rubin. "Metal-free ring expansion of indoles with nitroalkenes: a simple, modular approach to 3-substituted 2-quinolones". RSC Advances 5, n.º 12 (2015): 8647–56. http://dx.doi.org/10.1039/c4ra14406f.

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42

Tian, Qingqiang, Wen Luo, Zongjie Gan, Dan Li, Zeshu Dai, Huajun Wang, Xuetong Wang y Jianyong Yuan. "Eco-Friendly Syntheses of 2-Substituted Benzoxazoles and 2-Substituted Benzothiazoles from 2-Aminophenols, 2-Aminothiophenols and DMF Derivatives in the Presence of Imidazolium Chloride". Molecules 24, n.º 1 (4 de enero de 2019): 174. http://dx.doi.org/10.3390/molecules24010174.

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A simple, economical and metal-free approach to the synthesis of 2-substituted benzoxazoles and 2-substituted benzothiazoles from 2-aminophenols, 2-aminothiophenols and DMF derivatives, only using imidazolium chloride (50% mmol) as promoter without any other additive, was reported. Various 2-substituted benzoxazoles and 2-substituted benzothiazoles were thus prepared in moderate to excellent yields.

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43

KANDASAMY, K., SHANKAR J. SHETTY, P. N. PUNTAMBEKAR, T. S. SRIVASTAVA, T. KUNDU y BHANU P. SINGH. "Effects of Metal Substitution on Third-order Optical Non-linearity of Porphyrin Macrocycle". Journal of Porphyrins and Phthalocyanines 03, n.º 02 (febrero de 1999): 81–86. http://dx.doi.org/10.1002/(sici)1099-1409(199902)3:2<81::aid-jpp107>3.0.co;2-0.

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The effects of axial ligands in Sn ( IV )-substituted 5,10,15,20-tetrakis [4-(carboethoxymethyleneoxy)phenyl]porphyrin and divalent transition metal substitution in 5,10,15,20-tetraphenylporphyrin on the second molecular hyperpolarizability (γ) at 802 nm were studied using the Z-scan technique. A significant increase in γ for divalent metal ions is observed with decreasing d-shell occupancy. In the case of the tetravalent metal-substituted porphyrin a dramatic enhancement of γ is seen when a strongly electronegative axial ligand such as I 2 is attached to the metal ion. A plausible explanation for the observed trend of γ has been sought in terms of metal-ligand interaction.

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44

Son, Se In, Won Koo Lee, Jieun Choi y Hyun-Joon Ha. "Atom economical synthesis of oxindoles by metal-catalyzed intramolecular C–C bond formation under solvent-free and aerobic conditions". Green Chemistry 17, n.º 6 (2015): 3306–9. http://dx.doi.org/10.1039/c5gc00703h.

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Liu, Yuan, Yang Yu, Yiwei Fu, Yonghai Liu, Lei Shi, Hao Li y Wei Wang. "Transition-metal-free synthesis of indolizines via [3 + 2]-annulation from α-bromoenals and 2-substituted azaarenes". Organic Chemistry Frontiers 4, n.º 11 (2017): 2119–23. http://dx.doi.org/10.1039/c7qo00529f.

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Zhao, Hongxia, Li Tao, Fengmin Zhang, Ying Zhang, Yanqing Liu, Hongjie Xu, Guowang Diao y Lubin Ni. "Correction: Transition metal substituted sandwich-type polyoxometalates with a strong metal–C (imidazole) bond as anticancer agents". Chemical Communications 56, n.º 15 (2020): 2364. http://dx.doi.org/10.1039/d0cc90050h.

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Ranganathan, R. y G. Thummes. "Electrical Resistivity of Transition Metal Substituted Y9Co7Compounds". Japanese Journal of Applied Physics 26, S3-1 (1 de enero de 1987): 821. http://dx.doi.org/10.7567/jjaps.26s3.821.

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Burdukov, Alexei B., Victor I. Ovcharenko, Dmitrii A. Guschin, Vladimir A. Reznikov, Vladimir N. Ikorskii, Yurii G. Shvedenkov y Natalie V. Pervukhina. "Metal Complexes of the Nitrile-Substituted Nitroxides". Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 334, n.º 1 (1 de septiembre de 1999): 395–404. http://dx.doi.org/10.1080/10587259908023337.

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Cowan, J. A. y Harry B. Gray. "Synthesis and properties of metal-substituted myoglobins". Inorganic Chemistry 28, n.º 11 (mayo de 1989): 2074–78. http://dx.doi.org/10.1021/ic00310a013.

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Siedle, A. R., Robert J. Webb, Fred E. Behr, Richard A. Newmark, David A. Weil, Kristin Erickson, Roberta Naujok et al. "Perfluoroalkyl-Substituted Triazapentadienes and Their Metal Complexes". Inorganic Chemistry 42, n.º 4 (febrero de 2003): 932–34. http://dx.doi.org/10.1021/ic020550t.

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