meso -Tetrathienylporphyrins: Steady-state emission and structural properties |
| |
Authors: | P Bhyrappa M Sankar B Varghese and P Bhavana |
| |
Institution: | (1) Department of Chemistry, Indian Institute of Technology, 600 036 Madras, Chennai |
| |
Abstract: | meso-Tetra (2′- and 3′-thienyl)porphyrins and their Zn(II)-complexes were examined by steady-state fluorescence measurements. These
molecules exhibit significant bathochromic shift in their emission bands with decreased quantum yields relative to their correspondingmeso-tetraphenylporphyrin derivatives. The crystal structure of 5,10,15,20-tetrakis(3′-thienyl)porphinato zinc(II) shows planar and nonplanar stereochemical features of the macrocycle. One of the macrocycle
shows nearly planar while the other exhibited predominantly saddle-shaped geometry. The extent of displacement of the Β-pyrrole
carbons in the nonplanar (saddle) conformation is as high as ± 0·422 ?. |
| |
Keywords: | Metalloporphyrins thienylporphyrins steady-state emission crystal structure |
本文献已被 SpringerLink 等数据库收录! |