Novel benzothiadiazole-based second-ordernonlinear optical (NLO) chromophores with different push–pull structures were developed. Incorporation of benzothiadiazole (BTD) as a bridge for improving the electro-optic (EO) coefficient (r33) of bulky materials has not been well investigated, despite its extensive application in other photonic materials as electron acceptor. NMR and MS have been used to
开发了具有不同推挽结构的新型基于苯并噻二唑的二阶非线性光学(NLO)发色团。尽管苯并噻二唑(BTD)作为改善大体积材料的电光(EO)系数(r 33)的桥梁,但尚未广泛研究,尽管其在其他光子材料中广泛用作电子受体。核磁共振和质谱已用于表征合成发色团5-7的结构。通过紫外可见光谱研究了光学性质。密度泛函理论计算已经被用于计算第一阶超极化率(β发色团)R1,5A,7A和图5b。此外,客体-主体EO聚合物5a / PC和5b / PC的极化结果分别提供了良好的r 33值,分别为67 pm V -1和45 pm V -1。所有结果都表明,将BTD掺入发色团后,微观和宏观非线性都得到了改善。
Convenient One<b>-</b>PotSynthesis of 4<b>-</b>(Dialkylaminobenzyl)triphenylphosphoniumSalts - Application to the Synthesis of a Fluorescent Probefor Multiphotonic Imaging of Biological Membranes
An efficient one-pot preparation of (dialkylaminobenzyl)triphenylphosphonium salts directly from dialkylbenzenamine is described. The one-pot procedure proceeds quickly in high yields and allows the synthesis of useful reagents for Wittig reaction. Their potential is illustrated by the synthesis of a bolaamphiphilic fluorophore of interest for biological membrane imaging.
Two-photon excited fluorescent probes for calcium based on internal charge transfer
作者:Xiaohu Dong、Yiyao Yang、Jian Sun、Zhihong Liu、Bi-Feng Liu
DOI:10.1039/b905571a
日期:——
Two-photon excited (TPE) calcium fluorescent probes are designed and synthesized based on internal charge transfer (ICT) with high Ca2+ affinity and large two-photon action cross section, which can be used in living cells and detected with two-photon microscopy (TPM).
Replacement of the open chain dithienylethylene
Ï-conjugating spacer by its bridged analog in pushâpull NLO-phores
produces a dramatic increase of the quadratic hyperpolarisability.
在推拉式 NLO 荧光中,用其桥接类似物取代开链二噻吩乙烯Ï-共轭间隔物,可显著提高二次超极性。
Linear and Nonlinear Optical Properties of Diiron μ-Vinylcarbyne Acceptor and Stilbenyl Donor Based Chromophores
作者:Tony Farrell、Timo Meyer-Friedrichsen、Jürgen Heck、Anthony R. Manning
DOI:10.1021/om000112z
日期:2000.8.1
Ionic [(CpFeCO)2(μ-CO)(μ-CCHCH−)]+ fragments were used as electron acceptors in combination with para-substituted stilbenyl donors to form push−pull chromophores. These μ-vinylcarbyne salts were prepared by two complementary procedures: (a) the direct condensation of the μ-ethylidyne complex [(CpFeCO)2(μ-CO)(μ-CCH3)][BF4] with various stilbenyl aldehydes and (b) the preparation and reaction of the