Inclusion complexes of 9,10-dihydro-9,10-etheno-anthracene-11,12-bis(diphenylphosphine oxide) (1) as host are synthesized using a variety of guest solvent molecules and the photochemistry of the host molecule is studied in solution and in the crystalline complexes. The crystal structures of four complexes are determined and correlated with their photochemical reactivity. In each case only one dibenzosemibullvalene photoproduct is obtained in the photolysis. Since three of the complexes studied crystallize in the chiral space group P212121, irradiation of single crystals produces a chiral photoproduct in >90% enantiomeric excess. Determination of the absolute configurations of reactants and products allows elucidation of the key structural features that control the enantiospecific solid-state photorearrangements.
研究人员使用多种客体溶剂分子合成了以 9,10-二氢-9,10-乙烯基蒽-11,12-双(二苯基氧化膦)(1)为宿主的包合物,并研究了宿主分子在溶液和晶体复合物中的光化学反应。确定了四种络合物的晶体结构,并将其与光化学反应活性联系起来。在每种情况下,在光解过程中只得到一种二苯并噻二茂缬烯光反应产物。由于所研究的复合物中有三种在手性空间群 P212121 中结晶,因此辐照单晶可产生手性光反应产物,对映体过量率为 90%。通过测定反应物和产物的绝对构型,可以阐明控制对映体特异性固态光重排的关键结构特征。