Copper(i) halide polymers derived from tris[2-(pyridin-2-yl)ethyl]phosphine: halogen-tunable colorful luminescence spanning from deep blue to green. (16th April 2020)

• Record Type: Journal Article
• Authors: Artem'ev, Alexander V.; Baranov, Andrey Yu.; Rakhmanova, Mariana I.; Malysheva, Svetlana F.; Samsonenko, Denis G.
• Is Part Of: New journal of chemistry. Volume 44:Number 17(2020)
• Page Start: 6916
• Page End: 6922
• Publication Date: 2020-04-16
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d0nj00894j
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A series of isostructural 1D coordination polymers bearing stair-step [Cu4 X4 ] modules is reported. At ambient temperature, they feature bright halogen-modulated colorful luminescence spanning from deep blue to green. Abstract : A series of isostructural 1D coordination polymers (CPs), [Cu4 X4 (L)2 ] n where X = Cl (1 ), Br (2 ), I (3 ), have been synthesized via the reaction of Cu(i ) halides with tris[2-(pyridin-2-yl)ethyl]phosphine (L). 1D chains of these CPs are built up by alternating stair-step [Cu4 X4 ] modules bridged by "PyCH2 CH2 P" ligand arms. At ambient temperature, the titled polymers exhibit strong luminescence, the color of which is tuned by the halogen atoms spanning from deep-blue ( λ max = 448 nm, for X = I) to green ( λ max = 520 nm, for Cl) through cyan ( λ max = 490 nm, for Br). The emission lifetimes fall close to the 13–24 μs region at 300 K, and PL quantum yields (45–62%) are the highest among yet known emitters bearing stair-step [Cu4 X4 ] units. A combination of spectral studies and (TD)DFT computations suggests that the emission of the CPs represents phosphorescence stemmed from the 3 (M + X)LCT excited states.