Crystal engineering using very short and linear C(sp)–H⋯N hydrogen bonds: formation of head-to-tail straight tapes and their assembly into nonlinear optical polar crystals
- 19 July 2001
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Chemical Communications
- No. 16,p. 1454-1455
- https://doi.org/10.1039/b103689k
Abstract
The crystallization of 4-ethynylpyridine (1) and 4-(4-ethynylphenyl)ethynylpyridine (2) leads to C(sp)-HN hydrogen bonded straight tapes that further assemble into polar crystals, in the case of 2, and show intense powder SHG response, 8 times more efficient than crystalline urea.Keywords
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