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Columnar/herringbone dual crystal packing of pyrenylsumanene and its photophysical properties.

ABSTRACT: A single crystal of pyrenylsumanene was found to exhibit both columnar and herringbone crystal packing. The sumanene moieties form unidirectional columnar structures based on ?-? stacking while the pyrene moieties generate herringbone structures due to CH-? interactions. The absorption and emission maxima of pyrenylsumanene were both red-shifted relative to those of sumanene and pyrene, owing to the extension of ?-conjugation. Monomer emission with high quantum yield (0.82) was observed for pyrenylsumanene in solution, while excimer-type red-shifted emission was evident in the crystalline phase.

SUBMITTER: Shrestha BB 

PROVIDER: S-EPMC3999760 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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Columnar/herringbone dual crystal packing of pyrenylsumanene and its photophysical properties.

Shrestha Binod Babu BB   Higashibayashi Shuhei S   Sakurai Hidehiro H  

Beilstein journal of organic chemistry 20140411

A single crystal of pyrenylsumanene was found to exhibit both columnar and herringbone crystal packing. The sumanene moieties form unidirectional columnar structures based on π-π stacking while the pyrene moieties generate herringbone structures due to CH-π interactions. The absorption and emission maxima of pyrenylsumanene were both red-shifted relative to those of sumanene and pyrene, owing to the extension of π-conjugation. Monomer emission with high quantum yield (0.82) was observed for pyre  ...[more]

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