Synthesis of monovinyl- and divinyl-chlorophyll analogs and their physical properties
作者:Kifa Kim、Kazuki Tsuji、Yusuke Kinoshita、Tomohiro Miyatake、Hitoshi Tamiaki
DOI:10.1016/j.tet.2016.12.003
日期:2017.1
and the 8-vinylation induced red shifts of the Soret/Qx maxima and no (or faint red) shifts of the Qy/emission maxima. Zinc complexes of 3,7- and 3,8-divinyl-chlorins showed almost the same optical properties including fluorescence emission quantum yields and lifetimes as well as the same first oxidation potentials, thus, 3,7-divinyl-chlorophyll-a could be considered an alternative pigment to the naturally
叶绿素一个被化学修饰以甲基pyropheophorbides-一个具有3,8-二乙基,3-乙烯基-8-乙基,3-乙基-8-乙烯基,和3,8-二乙烯基团。通过叶绿素b的衍生化制备类似的3-乙基-7-乙烯基-和3,7-二乙烯基-二氢卟酚。将合成的游离碱以及3-乙烯基二氧合锌锌溶解在THF中,并通过包括可见吸收,圆二色性和荧光发射光谱的光谱对单体稀释的溶液进行表征。光学数据表明3-乙烯基化红移了可见光(Soret / Qx / Qy)吸收和荧光发射最大值,7乙烯基化将Soret / Qx和Qy /发射带分别移至更长和稍短的波长,并且8乙烯基化导致Soret / Qx最大值发生红移,而Qy /发射最大值没有(或微弱的红移)。3,7-和3,8-二乙烯基-二氢卟酚的锌配合物显示出几乎相同的光学性质,包括荧光发射量子产率和寿命以及相同的第一氧化电位,因此3,7-二乙烯基-叶绿素-a可以被认为是天然存在的3,8-二乙烯基类似物的替代颜料。