В 58 Влияние мею-алкильных заместителей в полиметиновой цепи тиакарбоцианинов на морфологию агрегатов красителей / Б. И. Шапиро, Л. С. Соколов , В. А. Кузьмин, А. И. Толмачев, Ю. Л. Сломинский, Ю. Л. Брикс // Российские нанотехнологии. - 2012. - Т. 7, № 5-6. - С. 28-33 : рис., табл. - Библиогр.: с. 33 (15 назв.) . - ISSN 1992-7223
Рубрики: ТЕХНИКА. ТЕХНИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ЗАМЕСТИТЕЛИ МЕЗО-АЛКИЛЬНЫЕ -- КРАСИТЕЛИ -- АГРЕГАТЫ КРАСИТЕЛЕЙ -- ГРУППА АЛКИЛЬНАЯ -- СВОЙСТВА СПЕКТРАЛЬНЫЕ Аннотация: By the example of investigated meso-alkyl-substituted thiacarbocyanines it is shown, that ethyl substituent, as a rule, stimulates formation in water solutions of long-wave J-aggregates, and the methyl substituent promotes formation of short-wave H*-aggregates. Formation of dye aggregates occurs from dimmers on «block mechanism». For the first time for methyl-substituted thiacarbocyanines is established the formation in the field of absorption of dimmers of 3 types bands and is lead them the attribution to dimmers, consisting from cis-, cis/trans- and trans-conformation of dyes. Also for the first time formation of 3 types of H*-aggregates from corresponding 3 forms of dimmers is shown. It is established, that introduction in water solutions of dyes multiply charget cations Eu+ 3 displaces equilibrium nD↔aggregat for meso-CH 3-substituted dyes aside H*-aggregates, and for meso-C 2H 5-substituted dyes aside J-aggregates. Thus, it is shown, that alkyl-group in meso-position of the polymethine chain of thiacarbocyanines for the spatial reasons plays a role of a regulator of aggregation process and by that determines the morphology and spectral properties of the formed aggregates |