[The hydrogen bond between 5-(2-carboxyphenyl)-10, 15, 20-triphenylporphyrin and amino acid ester--study with UV-Vis titration and 1H-NMR].
The hydrogen bonds between the hydrogen of pyrrols in 5-(2-carboxyphenyl)-10,15,20-triphenylporphyrin and the oxygen of the carboxyl group of amino acid ester were confirmed by UV-Vis spectroscopic titration method and 1H-NMR. When amino acid ester was added to o-TPPCO2H solution in CHCl3, the Soret and Q and red-shifted dramatically and several isobestic points could be observed in UV-Vis spectra. In 1H-NMR, the signal of the hydrogen atoms of pyrrole in o-TPPCO2H (-2.78 ppm) decreased and a new signal in 0.260 ppm emerged, when o-TPPCO2H mixed with L-PheOEt at 1 : 1 (mol/mol).
Peng
X
X
Department of Chemistry, Zhongshan University, 510275 Guangzhou.
Huang
J
J
Ji
L
L
D000596:Amino Acids / Q000737:chemistry*; D004952:Esters / Q000737:chemistry*; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D011166:Porphyrins / Q000737:chemistry*; D013053:Spectrophotometry
D000596:Amino Acids; D004952:Esters; D011166:Porphyrins