Issue 11, 2010
From the journal:

Dalton Transactions

Luminescence quenching of Re(i) molecular rectangles by quinones†

Thangamuthu Rajendran,ab   Balasubramanian Manimaran,a   Rong-Tang Liao,a   Yen-Hsiang Liu,a   Pounraj Thanasekaran,a   Ren-Jay Lin,d   I-Jy Chang,d   Pi-Tai Chou,e   Ramasamy Ramaraj,c   Seenivasan Rajagopal*c  and  Kuang-Lieh Lu*a  

* Corresponding authors

a Institute of Chemistry, Academia Sinica, Taipei, Taiwan
E-mail: lu@chem.sinica.edu.tw
Fax: +886-2-27831237
Tel: +886-2-27898518

b Vivekananda college, Tiruvedakam West, Madurai, India

c School of Chemistry, Madurai Kamaraj University, Madurai, India

d Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan

e Department of Chemistry, National Taiwan University, Taipei, Taiwan

Abstract

The rhenium-based rectangles [{Re(CO)3(μ-bpy)Br}{Re(CO)3(μ-L)Br}]2 (I, L = 4,4′-dipyridylacetylene (dpa); II, L = 4,4′-dipyridylbutadiyne (dpb); III, L = 1,4-bis(4′-pyridylethynyl)benzene (bpeb); bpy = 4,4′-bipyridine) are emissive in solution at room temperature. The presence of extended π conjugation leads to an increase in electron delocalization, which, in turn, results in improved luminescence and lower nuclear reorganization energy. These rectangles, upon electronic excitation, undergo facile electron transfer (ET) reactions with quinones and both the dynamic and static quenching contribute to the reaction. Spectral and electrochemical measurements show that quinone 7,7,8,8-tetracyanoquinodimethane (TCNQ) binds strongly to rectangle I. The driving force dependence of ket, deduced from the luminescence quenching of rectangles with quinones, can be well accounted for within the context of the Marcus theory of electron transfer.

Graphical abstract: Luminescence quenching of Re(i) molecular rectangles by quinones

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/B925978C
Article type
Paper
Submitted
09 Dec 2009
Accepted
21 Dec 2009
First published
11 Feb 2010

Dalton Trans., 2010,39, 2928-2935

Permissions

Request permissions

Luminescence quenching of Re(I) molecular rectangles by quinones

T. Rajendran, B. Manimaran, R. Liao, Y. Liu, P. Thanasekaran, R. Lin, I. Chang, P. Chou, R. Ramaraj, S. Rajagopal and K. Lu, Dalton Trans., 2010, 39, 2928 DOI: 10.1039/B925978C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements