выводы.
1. Показано, что закрытая форма исследованных краунсодержащих нафтопиранов образует с катионами комплексы 1:1, а с катионами Ва2+ - комплексы 1:1 и 2:1. Комплексообразование приводит к гипсохромному сдвигу полосы поглощения закрытой формы краунсодержащих нафтопиранов.
2. Исследованные нафтопираны при облучении вступают в термически обратимую реакцию образования открытой формы, определяющую их фотохромные свойствавсе соединения обладают хорошей фотостабильностью. Нафтопираны, содержащие стириловый фрагмент, также вступают в необратимую реакцию цис-транс фотоизомеризации.
3. Комплексообразование нафтопирана, аннелированного 15-краун-5 эфиром, с катионами металлов приводит к уменьшению времени жизни открытой формы. Связывание катионов краунсодержщими стириловыми производными нафтопиранов не оказывает влияния на фотохромные свойства данных соединений.
4. Из всех исследуемых соединений флуоресцируют только стириловые производные нафтопиранов, содержащие диэтиламин или моноаза-15-краун-5 эфир в пара-положении стирилового фрагмента. Показано, что полоса флуоресценции данных соединений в ацетонитриле обусловлена образованием скрученного возбужденного состояния состояния с переносом заряда (ТГСТ). При этом флуоресцирует только трансизомер закрытой формы, цисизомер и открытая форма не являются флуоресцентными. Флуоресценцию данных соединений можно переключать посредством фотохромной реакции.
5. Комплексообразование с катионами оказывает существенное влияние на флуоресцентные свойства стирилового производного нафтопирана, содержащего моноаза-15-краун-5 эфир в параположении стирилового фрагмента, что делает данное соединение перспективным в качестве основы для создания сенсоров на катионы металлов.
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