Unusual solvent dependent optical absorption spectral properties of free-base perhaloporphyrins

被引：37

作者：

Bhyrappa, P ^{[1
]}

Bhavana, P ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem, Madras 600036, Tamil Nadu, India

来源：

CHEMICAL PHYSICS LETTERS | 2001年 / 342卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(01)00572-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A pair of free-base perhaloporphyrins, 2,3,7,8,12,13, 17,18-octabromo- and octachloro-5,10,15,20-tetraphenylporphyrins (H2OBTPP and H2OCTPP) were examined in solvents of varying polarity to delineate the effect of solvent on the optical absorption features. The perhaloporphyrins exhibit strong solvent-dependent absorption spectral features in contrast to 5,10,15,20-tetraphenylporphyrin, H2TPP. A dramatic red-shift of Soret, B (> 25 nn) and visible, Q (> 50 nm) were observed for perhaloporphyrins in polar solvents relative to non-polar solvents. This has been ascribed to the enhanced distortion of the macrocyclic ring induced by hydrogen-bonding interaction between the porphyrin core pyrrolic N-H or pyrrolenine nitrogens with the solvent molecules. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：39 / 44

页数：6

共 33 条

[11]

Gouterman M., 1978, PORPHYRINS, V3

[12] Electrooxidation of cobalt(II) β-brominated-pyrrole tetraphenylporphyrins in CH2Cl2 under an N2 or a CO atmosphere [J].

Kadish, KM ;

Li, J ;

Van Caemelbecke, E ;

Ou, ZP ;

Guo, N ;

Autret, M ;

D'Souza, F ;

Tagliatesta, P .

INORGANIC CHEMISTRY, 1997, 36 (27) :6292-6298

[13]

Lyons J. E., 1994, METALLOPORPHYRINS CA

[14]

MANSUY D, 1993, ACTIVATION OF DIOXYGEN AND HOMOGENEOUS CATALYTIC OXIDATION, P347

[15] NONPLANAR DISTORTION MODES FOR HIGHLY SUBSTITUTED PORPHYRINS [J].

MEDFORTH, CJ ;

SENGE, MO ;

SMITH, KM ;

SPARKS, LD ;

SHELNUTT, JA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (25) :9859-9869

[16] NMR studies of nonplanar porphyrins .2. Effect of nonplanar conformational distortions on the porphyrin ring current [J].

Medforth, CJ ;

Muzzi, CM ;

Shea, KM ;

Smith, KM ;

Abraham, RJ ;

Jia, SL ;

Shelnutt, JA .

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2, 1997, (04) :839-844

[17] METALLOPORPHYRINS AS VERSATILE CATALYSTS FOR OXIDATION REACTIONS AND OXIDATIVE DNA CLEAVAGE [J].

MEUNIER, B .

CHEMICAL REVIEWS, 1992, 92 (06) :1411-1456

[18] INFLUENCE OF AXIAL LIGANDS ON METALLOPORPHYRIN VISIBLE ABSORPTION-SPECTRA - COMPLEXES OF TETRAPHENYLPORPHINATOZINC [J].

NAPPA, M ;

VALENTINE, JS .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1978, 100 (16) :5075-5080

[19]

OCHSENBEIN P, 1994, ANGEW CHEM INT EDIT, V33, P348, DOI 10.1002/anie.199403481

[20]

Perrin D.D., 1988, Purification of Organic Solvents

← 1 2 3 4 →