Syntheses and Photophysical Properties of Aminobenzopyranoxanthene Dyes Containing Various Alkyl Chains at Amine Moieties
摘要:
Aminobenzopyranoxanthene (ABPX) dyes containing linear n-alkyl chains at amino groups were synthesized, and their cis and trans stereoisomers were isolated. Detailed spectrophotometric studies revealed that all the ABPX derivatives exhibited fluorescence emission in the far-red and near-infrared wavelength regions, and their fluorescence quantum efficiency increased with increasing n-alkyl chain length. Almost no differences in photophysical properties were observed between the cis and trans stereoisomers.
RHODAMINE-BASED COLORANT COMPOUND AND PROCESS FOR PRODUCING SAME
申请人:RIKEN
公开号:US20180244923A1
公开(公告)日:2018-08-30
Provided is a compound capable of exhibiting different changes in hue with one kind of molecule. The compound has julolidine structures, and is represented by a general formula (1):
wherein each of Q and Q
1
represents C(R) or N; R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, or a carboxyl group, where two Rs may bind to each other to form a ring; R
1
represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, or a carboxyl group, where two R
1
s may bind to each other to form a ring; n represents a number of 0 to 3; and m represents a number of 0 to 3.
A new class of rhodamine luminophores, 3',3''-bis(oxospiroisobenzofuran)-3,7-bis(dialkylamino)benzopyrano-xanthene derivatives (ABPX), have been successfully developed. The emission behavior of ABPX series is directly opposite to the concentration quenching of conventional rhodamine dyes. ABPX series exhibit aggregation-inducedemissionenhancement (AIEE).
Rhodamine-based colorant compound and process for producing same
申请人:RIKEN
公开号:US10435564B2
公开(公告)日:2019-10-08
Provided is a compound capable of exhibiting different changes in hue with one kind of molecule. The compound has julolidine structures, and is represented by a general formula (1):
wherein each of Q and Q1 represents C(R) or N; R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, or a carboxyl group, where two Rs may bind to each other to form a ring; R1 represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, or a carboxyl group, where two R1s may bind to each other to form a ring; n represents a number of 0 to 3; and m represents a number of 0 to 3.
We report synthesis and characterization of near-infrared (NIR)-absorbing/emitting Thiele's hydrocarbon derivatives, in which four aryl groups are bridged to a quinodimethane skeleton. The quinoid structure of the bridged-tetra-aryl-p-quinodimethanes (BTAQs) was confirmed by spectroscopic, X-ray crystallographic, and computational methods. Although quinodimethane derivatives with a small HOMO-LUMO energy gap often exhibit biradical character, BTAQs showed no biradical character. Instead, they exhibited two-step near-infrared electrochromism. The donor/acceptor properties of the aryl groups were found to play a key role in the unique properties of BTAQs.
UVA FILTER AUF DER BASIS VON ASCORBINSÄUREDERIVATEN