Synthetic substituted boronates of dihydroxy-bacteriochlorin absorbing and emitting far-red to near-infrared light as bacteriopheophytin-a analogs

被引：4

作者：

Funakoshi, Daichi ^{[1
]}

Nomura, Yosaku ^{[1
]}

Shoji, Sunao ^{[1
,2
]}

Tamiaki, Hitoshi ^{[1
]}

机构：

[1] Ritsumeikan Univ, Grad Sch Life Sci, Kusatsu, Shiga 5258577, Japan

[2] Hokkaido Univ, Fac Engn, Div Appl Chem, Sapporo, Hokkaido 0608628, Japan

来源：

DYES AND PIGMENTS | 2020年 / 175卷

基金：

日本学术振兴会;

关键词：

Chlorophyll-a; Fluorescence emission; Qy absorption; Semisynthesis; Substitution effect; SELF-AGGREGATION; PHOTODYNAMIC THERAPY; DERIVATIVES; CHLORINS;

D O I：

10.1016/j.dyepig.2019.108155

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Several substituted boronates of methyl cis-7,8-dihydroxy-pyrobacteriopheophorbide-a possessing the same 3-acetyl-13(1)-oxo-bacteriochlorin pi-conjugated system as bacteriopheophytin-a found in type-II reaction centers of anoxygenic photosynthetic bacteria were prepared by chemical modification of chlorophyll-a. The semisynthetic bacteriochlorins are less oxidizable to chlorins and more readily available from natural phototrophs than the above natural bacteriochlorin, while the formers show similar optical properties in solution as the latter. All the boronate pigments efficiently absorb near ultraviolet, green, and far-red light and strongly emit light in a far-red to near-infrared region. Their electronic absorption and fluorescence emission data are nearly independent of the alkyl and (hetero)aromatic substituents at the boron atom.

引用

页数：6