【摘要】 研究了新的含12个丁氧基偶氮苯介晶基元的一代树状碳硅烷液晶D1及偶氮苯介晶基元化合物M5在氯仿、四氢呋喃、N,N-二甲基甲酰胺、乙醇和苯等溶剂中的量子产率、反-顺光异构化、光回复异构、反/顺异构组分比、热回复异构及活化能.D1和M5的光致变色速率常数为10^-1s^-1,而含同一偶氮基元的光致变色液晶聚硅氧烷的光致变色速率常数为10^-8s^-1,因此,液晶树状物D1的光响应速度比后者快10⁷倍.更多还原

【Abstract】 The quantum yield, trans/cis photoisomerization, photo back-isomerization, trans/cis isomer ratio, thermal back-isomerization, activation energy of a new carbosilane liquid crystalline (LC) dendrimer of the first generation (D1) containing twelve 4-butoxyazobenzene mesogen in its periphery and azobenzene unit compound M5 in CHCl3, THF, DMF, EtOH and C6H6 are described. Photochromic rate constant of D1 and M5 are 10-1 s-1, but that of photochromic LC polysiloxanes containing the same azobenzene moieties is 10-8 s-1, thus the photoresponsive rate of LC dendrimer Dl is 107 times larger than that of the latter.更多还原