Luminescence properties of Eu3+, Tb3+, and Gd3+ complexes of the hexadentate N-donor podand tris-[3-(2-pyridyl)pyrazol-1yl]hydroborate

被引：23

作者：

Armaroli, N

Balzani, V

Barigelletti, F

Ward, MD

McCleverty, JA

机构：

[1] UNIV BOLOGNA,DIPARTIMENTO CHIM G CIAMICIAN,I-40126 BOLOGNA,ITALY

[2] UNIV BRISTOL,SCH CHEM,BRISTOL BS8 1TS,AVON,ENGLAND

来源：

CHEMICAL PHYSICS LETTERS | 1997年 / 276卷 / 5-6期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/S0009-2614(97)00865-8

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：

The photophysical properties of Gd3+ Eu3+ and Tb3+ complexes of a podand ligand tris[3-(2-pyridyl)-pyrazolyl]hydroborate (L-) have been investigated in five solvents. [Gd(L)(NO3)(2)] (Gd-A) exhibits only the typical ligand-centered spectroscopy, i.e. luminescence and triplet-triplet absorption, whereas Eu-A and To-A show only the characteristic metal centered luminescence. The results obtained show that the podand does not fully surround the metal ion and the ligand-to-metal energy transfer efficiency is high for Tb-A because a large energy gap prevents back energy transfer, but it is small for Eu-A, because of the presence of low energy charge-transfer excited states. Also the three bis-podand complexes [LnL(2)](+). (Ln-B) have been investigated, but only in CH2Cl2 for solubility reasons. (C) 1997 Elsevier Science B.V.

引用

页码：435 / 440

页数：6

共 18 条

[11] SYNTHESIS, LUMINESCENCE QUANTUM YIELDS, AND LIFETIMES OF TRISCHELATED RUTHENIUM(II) MIXED-LIGAND COMPLEXES INCLUDING 3,3'-DIMETHYL-2,2'-BIPYRIDYL [J].