Influence of the methyl group at C=C bridging bond of stilbene on the longest wavelength maximum in ultraviolet absorption spectra
作者:Yanxiu Zhang、Chao-Tun Cao、Jingyuan Zhang、Chenzhong Cao
DOI:10.1002/poc.3705
日期:2017.12
C(CH3)=CH, respectively, in which the C(CH3)=CH has a side‐group CH3 at the carbon‐carbon double bond. A series of XSMBY were synthesized, and their longest wavelength maximum λmax (nm) in ultraviolet absorption spectra were measured in this work. We investigated the change regularity of the νmax (cm‐1, νmax = 1/λmax) of XSMBY and compared it with that of XSBY. The results indicate that (1) there is no
化合物stilbenes XArCH = CHArY(XSBY)和1,2-二苯基丙烯XArC(Me)= CHArY(XSMBY)分别具有桥接基团CH = CH和C(CH 3)= CH,其中C(CH 3)= CH在碳-碳双键上有一个侧基CH 3。合成了一系列XSMBY,并在这项工作中测量了它们在紫外线吸收光谱中的最长波长最大值λmax(nm)。我们研究了XSMBY的νmax(cm -1,νmax = 1 / λmax)的变化规律,并将其与XSBY的变化规律进行了比较。结果表明(1)νmax之间没有良好的线性关系。XSMBY和XSBY的版本。(2)由于侧基CH的影响的3,在同一对夫妇基团X和Y的的情况下,λ最大XSMBY的比XSBY的短,即,它具有蓝移。(3)侧基CH之间的交叉相互作用3和Y具有对ν有重要的影响最大XSMBY,而侧基CH之间的交叉相互作用3和X具有在ν影响不大最大值和可以忽略