期刊
CRYSTENGCOMM
卷 24, 期 27, 页码 4940-4947出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ce00408a
关键词
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资金
- Natural Science Foundation of Fujian Province [2021J02007, 2021J01553]
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China [2021ZR148]
Two new copper(I) iodide-based hybrids have been synthesized, one of which exhibits sensitive luminescence mechanochromism and unique luminescence thermochromism.
Two new copper(i) iodide-based hybrids, i.e. (Py3P-O-PPy3)(Cu2I4) (1) and (Py3P-O-PPy3)(Cu4I6) (2) (Py = pyrrolidine), have been prepared, in which the tripodal diphosphonium (Py3P-O-PPy3)(2+) is in situ generated in the one-pot synthesis. The disordered (Cu4I6)(2-) tetramers are rare with two sets of tetracuprate centers. Interestingly, 1 exhibits sensitive luminescence mechanochromism, which is ascribed to the disturbed cuprophilic Cu...Cu interactions and the crystalline packing adjustment by destroying C-H...I hydrogen bonds during mechanical force. In particular, the luminescence thermochromism is unique, whose fluorescence intensity is strengthened with the elevated temperature. This could be due to the S-2-S-1 internal conversion on the linear P-O-P backbone, which will be bent upon heating. Simultaneous luminescence thermo/mechanochromism can also be monitored in 1. However, no luminescence thermo/mechanochromic performances can be detected in 2, so the luminescence thermo/mechanochromism of 1 could be quenched with DMF. The conclusions in this work might provide a new large-scale synthesis strategy for intelligent responsive luminescent materials.
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