PHOTORESPONSIVE PEPTIDE AND POLYPEPTIDE SYSTEMS .10. SYNTHESIS AND REVERSIBLE PHOTOCHROMISM OF AZO AROMATIC POLY(L-ALPHA,BETA-DIAMINOPROPIONIC ACID)

被引：14

作者：

YAMAMOTO, H

NISHIDA, A

KAWAURA, T

机构：

[1] Institute of High Polymer Research, Faculty of Textile Science and Technology, Shinshu University, Ueda

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 1990年 / 12卷 / 04期

关键词：

Azo aromatic polypeptides; photo-induced solubility change; poly(l-α; β-diaminopropionic acid); reversible photochromism; β-structure;

D O I：

10.1016/0141-8130(90)90006-V

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Poly-l-α,β-diaminopropionic acid) having azo aromatic side chain was synthesized by the water-soluble carbodiimide procedure. The photochemical properties of the azo polypeptide poly[Nβ-p-(phenylazo)benzoyl-l-α,β- diaminopropionic acid] (PPABLDPA) was investigated by absorption and circular dichroism (c.d.) spectroscopy in hexafluoro-2-propanol (HFIP) and dimethylformamide. The photochromism of the absorption band in the visible and ultraviolet wavelength regions was found to be mostly reversible as a function of irradiation time at different wavelengths due to the photostationary state (88% trans)-cis photoisomerization of the azo aromatic moieties. The c.d. spectra exhibited two and three-stage photochromism on irradiation by light. The reversible photo-induced solubility change was also studied. On irradiation PPABLDPA is soluble under ultraviolet light (cis) and precipitates under visible light (88% trans) in HFIP-water. A discussion was presented that includes our previous results on this azo aromatic polylysine homologue series. © 1990.

引用

页码：257 / 262

页数：6

共 26 条

[21] PHOTORESPONSIVE PEPTIDE AND POLYPEPTIDE SYSTEMS .4. LIGHT-INDUCED CONFORMATIONAL-CHANGES IN ETA-POLY(L-LYSINE) WITH PHOTOCHROMIC SIDE-CHAINS [J].