卟啉-二芳基乙烯分子的合成及其无损读取性能

二噻吩乙烯是一类性能优良的有机光致变色化合物,在信息储存领域具有广阔的应用前景,本文以2-甲基噻吩、苯甲醛和吡咯为原料,经过多步反应合成了1-(2-甲基-3-噻吩基)-2-{2-甲基-5-{4-4-(10,15,20-三苯基-5-卟啉基)苯基]氨基羰基苯基}-3-噻吩基}环戊烯(DTE-TPP),其结构经核磁共振波谱仪(NMR)、质谱(MS)和傅里叶变换红外光谱仪(FTIR)表征确认,通过紫外-可见光谱研究了化合物的光致变色性能、抗疲劳性,并辅以荧光光谱探究了化合物的无损读取功能。结果表明,该化合物在254和660 nm的光照射下,发生可逆的光致变色反应,重复光照8次后其紫外-可见光谱与初始谱图相比无明显差异,显示出良好的抗疲劳性;当激发光为520 nm时,开、闭环异构体有较高的荧光对比度,有望实现数据的无损读取。

Synthesis and Nondestructive Information Processing Properties of Diarylethene-Based Porphyrin Derivative

The dithienylethene compounds offer broad application prospects in optical memory media due to their great performance in reversible chemical transition with irradiation of appropriate light. In this paper, a novel 1-(2-methyl-3-thienyl)-2-{2-methyl-5-{4-4-(10,15,20-triphenyl-5-porphinyl)phenyl]aminocarbonylphenyl}-3-thienyl}cyclopentene(DTE-TPP) was synthesized using 2-methylthiophene, benzaldehyde and pyrrole as starting materials, and its structure was fully characterized by nuclear magnetic resonance spectroscopy(NMR), mass spectrometry(MS) and Fourier transform infrared spectrometer(FTIR). Photochromic properties of the target compound, fatigue resistance and nondestructive readout capability were investigated by UV-Vis spectra and fluorescent emission spectroscopy. The UV-Vis spectra results indicate that DTE-TPP undergoes bistable and reversible photochromic reactions under irradiation, which is repeated at least eight times, at 254 and 660 nm light. The ring-opened form and ring-closed form of DTE-TPP exhibit great contrasts in fluorescence spectra(λ_ex=520 nm) and a nondestructive readout method may be achived.