中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 25,26,27,28-tetrahydroxy-2,8,14,20-tetrathiacalix[4]arene | 182496-69-1 | C24H16O4S4 | 496.653 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 5,11,17,23-tetraaminothiacalix[4]arene | 443144-40-9 | C24H20N4O4S4 | 556.711 |
—— | 5,11,17,23-tetraamino-25,26,27,28-tetrametho-xythiacalix[4]arene | 1418220-28-6 | C28H28N4O4S4 | 612.819 |
—— | 5,11,17,23-tetrakis(N'-(p-methyl-phenyl)ureido)-25,26,27,28-tetramethoxythiacalix[4]arene | 1418220-29-7 | C60H56N8O8S4 | 1145.42 |
Tetranitrothiacalix[4]arene can be easily transformed into 1,3-
The present work introduces the series of thiacalix[4]arenes (H4L) bearing different upper-rim substituents (R = H, Br, NO2) for rational design of ligands providing an antenna-effect on the NIR Yb3+-centered luminescence of their Yb3+ complexes. The unusual inclusive self-assembly of H3L− (Br) through Brπ interactions is revealed through single-crystal XRD analysis. Thermodynamically favorable formation of dimeric complexes [2Yb3+:2HL3−] leads to efficient sensitizing of the Yb3+ luminescence for H4L (Br, NO2), while poor sensitizing is observed for ligand H4L (H). X-ray analysis of the single crystal separated from the basified DMF solutions of YbCl3 and H4L(NO2) has revealed the transformation of the dimeric complexes into [4Yb3+:2L4−] ones with a cubane-like cluster structure. The luminescence characteristics of the complexes in the solutions reveal the peculiar antenna effect of H4L(R = NO2), where the triplet level at 567 nm (17,637 cm−1) arisen from ILCT provides efficient sensitizing of the Yb3+ luminescence.