Journal Article Amorphous porphyrin glasses exhibit near-infrared excimer luminescence

Morisue, Mitsuhiko  ,  Ueno, Ikuya  ,  Nakanishi, Takayuki  ,  Matsui, Takafumi  ,  Sasaki, Sono  ,  Shimizu, Masaki  ,  Matsui, Jun  ,  Hasegawa, Yasuchika

7 ( 37 )  , pp.22679 - 22683 , 2017-04-25 , Royal Society of Chemistry
ISSN:2046-2069
Description
The amorphous nature of a series of zinc-porphyrins bearing two 3,4,5-tri((S)-3,7-dimethyloctyloxy) phenyl groups at the meso-positions, named "porphyrin glass", were tolerant of pi-conjugation engineering in ethynylene-linked dimers. The butadiyne-linked dimeric porphyrin glass formed an intermolecular excimer, which exhibited bright and exceptionally long-lived, near-infrared (NIR) luminescence at approximately 970 nm in the solid state. Therefore, porphyrin glasses overcame a general bottleneck for NIR-luminescence, such as an undesired pi-stacked aggregation of a large porphyrin plane in addition to the energy gap law. The formation of amorphous molecular glasses from a series of meso-ethynylene-conjugated zinc-porphyrins, named "porphyrin glass", is described. The butadiyne-linked dimeric porphyrin glass formed an intermolecular excimer, which exhibited solid-state, near-infrared (NIR) luminescence at approximately 970 nm.
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http://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/66172/2/Amorphous%20porphyrin%20glasses%20exhibit%20near-infrared%20excimer%20luminescence%20.pdf

http://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/66172/1/Supplementary%20information%20.pdf

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