Influence of Triptycene Annulation on the Photochromism of Diphenylnaphthopyrans: Entropic Control of Thermal Reversion,Chemistry - A European Journal

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Influence of Triptycene Annulation on the Photochromism of Diphenylnaphthopyrans: Entropic Control of Thermal Reversion
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2022-11-27 , DOI: 10.1002/chem.202202757
Kanyashree Jana ₁ , Jarugu Narasimha Moorthy _{1,

2}

Affiliation

Entropically-controlled photochromism: The proximal and distal annulation of naphthopyran with rigid triptycene leads to regioisomeric naphthopyrans, which display highly divergent photochromic behaviors. The proximate isomer is so strained that its photogenerated colored open form enjoys more freedom to resist back cyclization. This constitutes the first example of entropically-controlled photochromism for the celebrated class of naphthopyrans.

中文翻译：

三蝶烯环化对二苯基萘并吡喃光致变色的影响：热回复的熵控制

熵控光致变色：萘并吡喃与刚性三蝶烯的近端和远端环化导致区域异构萘并吡喃，其显示出高度发散的光致变色行为。近似异构体非常紧张，以至于其光生有色开放形式享有更多的自由来抵抗反环化。这构成了著名的萘并吡喃类的熵控制光致变色的第一个例子。

更新日期：2022-11-27

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