Issue 26, 2011
From the journal:

Dalton Transactions

Luminescent square-planar platinum(ii) complexes with tridentate 3-bis(2-pyridylimino)isoindoline and monodentate N-heterocyclic ligands†

Hui-Min Wen,a   Yu-Hui Wu,a   Liang-Jin Xu,a   Li-Yi Zhang,a   Chang-Neng Chen*a  and  Zhong-Ning Chen*ab  

* Corresponding authors

a State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
E-mail: czn@fjirsm.ac.cn
Fax: 86-591-8379-2346

b State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China

Abstract

A series of platinum(II) complexes with 1,3-bis(2-pyridylimino)isoindoline (BPI) derivatives were prepared by substitution of the coordinated Cl in the precursor complex Pt(BPI)Cl with a N-heterocyclic ligand such as pyridine, phthalazine or phenanthridine. These complexes display orange to red luminescence in fluid dichloromethane solutions and in the solid states at room temperature. The photophysical properties were tuned by introducing electron-withdrawing -NO2 or electron-donating -NH2 to the BPI ligand. The DFT computational studies suggest that the emission in the N-heterocyclic ligand substituted platinum(II) complexes originates mainly from the 3[π→π*(BPI)] 3IL triplet excited state, mixed with some 3[dπ(Pt)→π*(BPI)]3MLCT character. Compared with the precursor Pt(BPI)Cl, both the low-energy absorption and the emission in the N-heterocyclic ligand substituted platinum(II) complexes exhibits a distinct blue-shift due to an obviously enhanced contribution from the 3IL state and a reduced 3MLCT character.

Graphical abstract: Luminescent square-planar platinum(ii) complexes with tridentate 3-bis(2-pyridylimino)isoindoline and monodentate N-heterocyclic ligands

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Article information

DOI
https://doi.org/10.1039/C1DT10385G
Article type
Paper
Submitted
08 Mar 2011
Accepted
20 Apr 2011
First published
06 Jun 2011

Dalton Trans., 2011,40, 6929-6938

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Luminescent square-planar platinum(II) complexes with tridentate 3-bis(2-pyridylimino)isoindoline and monodentate N-heterocyclic ligands

H. Wen, Y. Wu, L. Xu, L. Zhang, C. Chen and Z. Chen, Dalton Trans., 2011, 40, 6929 DOI: 10.1039/C1DT10385G

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