【摘 要】
：
研究了一种以Si为中心外围含4个丁氧基偶氮苯液晶基元的星型液晶化合物Si(AZO)4的光致变色规律,利用紫外 - 可见吸收光谱研究了在氯仿和四氢呋喃溶液中的量子产率、光致变色
论文部分内容阅读
研究了一种以Si为中心外围含4个丁氧基偶氮苯液晶基元的星型液晶化合物Si(AZO)4的光致变色规律,利用紫外 - 可见吸收光谱研究了在氯仿和四氢呋喃溶液中的量子产率、光致变色和光回复反应.实验结果表明样品在各溶液的光致变色和光回复反应均为一级动力学反应,并求算了光致变色反应的正、逆反应速率常数均为10-1 s-1数量级,是偶氮类侧链液晶高分子的速率常数的107倍,表明Si(AZO)4的星型结构对末端偶氮基团的吸收光谱没有明显影响,产物具有类似小分子的光致变色性,并且Si(AZO)4的正、逆反应速率常数比值小于液晶基元的比值,表明具有更好的光可逆性,有望作为光控开关和新型信息功能材料.
其他文献
提出了一个用于计算平均力势的普适性的理论框架,方法克服了以前的方法的缺陷,仅仅需要溶剂粒子在单个溶质粒子附近的密度分布作为输入.计算了两个大尺寸溶质粒子浸在小尺寸
The rate constants of reactions between the SO4·- radical and some common anions in atmospheric aqueous droplets e.g. Cl-,NO3-, HSO3- and HCO3- were determined
利用密度泛函理论对三线态HFSiS分子结构及其稳定性进行了详细的理论研究.在B3LYP/6-311G* *水平上计算出了各驻点的优化构型、振动频率,并对各个振动模式加以归属,在同样的
A new nanometer material, nano-Al2O3 with carbon fibre as the carrier, was employed for the removal of Cd with low concentrations from polluted water. The chara
A novel macrolactonization method was developed using a chiral β-lactam as the template. This novel method features that the macrocyclization is simultaneously
A novel triterpenoid, D:B-friedoursane-3α, 16α-dihydroxy-7α, 8α-epoxy-5(10)-ene,named petatrichol A, was isolated from the roots of Petasites tricholobus Fr
首先对结晶增长速率同浓度和链柔性依赖性进行总结,然后基于微晶核和粒--高分子键组网络结构模型和高分子分子分凝统计结晶动力学,根据高分子链组是微晶粒同连接链段复合体的
A PES-PC(polyethersulfone-polycarbonate) multi block random copolymer was synthesized with two oligomers, polyethersulfone and polycarbonate. The effects of the
A new approach to produce superfine WC-Co powder by direct reduction and carbonization is proposed. Water-soluble salts containing W and Co were used as raw mat
A new coupled finite element formulation is proposed to calculate a conformation tensor model in two complex flows: a planar contraction flow and a planar flow