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Synthesis of zinc porphyrins and effect of peripheral substituents on the coordination reaction

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Title Statement Synthesis of zinc porphyrins and effect of peripheral substituents on the coordination reaction
 
Added Entry - Uncontrolled Name Wang, Shujun
Peng, Yuling ; College of Chemistry and Materials Science, Langfang Teachers University, Langfang 065000, China
Zhang, Chenggen ; College of Chemistry and Materials Science, Langfang Teachers University, Langfang 065000, China
Li, Yongbing ; College of Chemistry and Materials Science, Langfang Teachers University, Langfang 065000, China
Liu, Chao ; College of Chemistry and Materials Science, Langfang Teachers University, Langfang 065000, China
the Natural Science Foundation of Hebei Province
 
Uncontrolled Index Term Synthetic and structural inorganic chemistry; Thermodynamics; theoretical & quantum chemistry
Coordination chemistry, Theoretical chemistry, Porphyrins, Zinc porphyrins, UV-visible spectroscopy, Fluorescence quenching
 
Summary, etc. Three free-base porphyrins, modified with Boc-d-threonine and their zinc porphyrins have been synthesized using benzaldehyde, 4-chlorobenzaldehyde, and 4-methoxybenzaldehyde. The effects of peripheral substituents on the coordination reactions between zinc porphyrins and imidazole derivatives have been studied by UV-visible spectroscopy, fluorescence spectrometry, and theoretical calculations. The results show that the coordination reaction forms a Zn-N bond between zinc porphyrins involving different peripheral substituents and imidazole derivatives. The association coordination constants decrease (N-MeIm > Im) due to the change in enthalpy; the zinc porphyrin synthesized using 4-chlorobenzaldehyde and N-methylimidazole shows the largest association constant. Fluorescent quenching is observed during the coordination process with the zinc porphyrin synthesized using 4-methoxybenzaldehyde and N-methylimidazole showing the largest Stern-Volmer quenching rate constant. In addition, theoretical calculations have been used to investigate essential characteristics of the reaction, charges, bond lengths, and bond energies for each system.
 
Publication, Distribution, Etc. Indian Journal of Chemistry -Section A (IJCA)
2020-12-17 16:46:42
 
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http://op.niscair.res.in/index.php/IJCA/article/view/10651
 
Data Source Entry Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 55, ##issue.no## 2 (2016): INDIAN JOURNAL OF CHEMISTRY - SECTION A
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCA/article/download/10651/29852
http://op.niscair.res.in/index.php/IJCA/article/download/10651/29955
http://op.niscair.res.in/index.php/IJCA/article/download/10651/29956
 
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