Design, crystal structures and enhanced frequency-upconverted lasing efficiencies of a new series of dyes from hybrid of inorganic polymers and organic chromophores
作者:Fuying Hao、Xuanjun Zhang、Yupeng Tian、Hongping Zhou、Lin Li、Jieying Wu、Shengyi Zhang、Jiaxiang Yang、Baokang Jin、Xutang Tao、Guangyong Zhou、Minhua Jiang
DOI:10.1039/b914656c
日期:——
A new series of hybrid dyes, trans-4-(4′-N,N-dialkylaminostyryl)-N-methyl pyridinium [Cd(SCN)3−]n [alkyl = Me(1), Et(2), Pr(3) and n–Bu(4)] have been successfully synthesized from hybrids of inorganic polymers and organic chromophores. The structures of four new hybrid dyes were characterized by single-crystal X-ray diffraction first. The particular features of the hybrid dyes are (1) the inorganic anions form isolated polymeric one-dimensional zig-zag chains of [Cd(SCN)3−]n with an extended π-conjugation system within the polymeric –[M–S–C≡N]–M… chain and high polarizabilities; and (2) the organic cationic chromophores determine their optical properties. Experimental results revealed that the TPA cross-section values and overall energy conversion efficiencies of hybrid dyes with different alkyl pendant groups have obviously increased from 1 to 4, and in particular, have been substantially enhanced compared to their corresponding iodide analogues 1′–4′. Therefore, we speculate that such increases are attributable to arrangements of infinite anionic [Cd(SCN)3−]n chains and synergic effects with chromophore cations.
由无机聚合物和有机发色团的混合物成功合成了一系列新的杂化染料--反式-4-(4′-N,N-二烷基氨基苯乙烯基)-N-甲基吡啶鎓[Cd(SCN)3-]n[烷基=Me(1)、Et(2)、Pr(3)和n-Bu(4)]。首先利用单晶 X 射线衍射对四种新型杂化染料的结构进行了表征。这些杂化染料的特点是:(1) 无机阴离子形成孤立的聚合物一维之字链[Cd(SCN)3-]n,在聚合物-[M-S-C≡N]-M...链中具有扩展的π共轭体系和高极化率;(2) 有机阳离子发色团决定了它们的光学性质。实验结果表明,具有不同烷基悬垂基团的杂化染料的 TPA 截面值和整体能量转换效率从 1 到 4 都有明显提高,特别是与相应的碘化物类似物 1′-4′ 相比有了大幅提高。因此,我们推测这种增加是由于无限阴离子[Cd(SCN)3-]n 链的排列以及与发色团阳离子的协同效应。