4-Methyl-3-morpholinecarboxylic acid hydrochloride (1:1)
CAS Number:
1240518-90-4
Molecular Formula:
C6H12ClNO3
Synthesis of near-infrared absorbing and fluorescent bis(pyrrol-2-yl)squaraines and their halochromic properties
Literature Information
Publication Date
2021-09-10
DOI
10.1039/D1QO01169C
Impact Factor
5.281
Authors
Yasuhiro Kubota, Masato Nakazawa, Junheon Lee, Ryoma Naoi, Motoki Tachikawa, Toshiyasu Inuzuka, Kazumasa Funabiki, Masaki Matsui, Taekyeong Kim
View Original
Abstract
1,3- and 1,2-Bis(pyrrol-2-yl)squaraines were easily and selectively synthesized. 1,2-Squaraines (partially conjugated neutral structure) showed blue-shifted λmax compared to the corresponding 1,3-squaraines (fully conjugated zwitterionic structure). Thiophene-fused 1,3-squaraine showed NIR absorption (781 nm) and fluorescence (833 nm). The λmax of thiophene-fused 1,3-squaraine was red-shifted to 1007 nm after mono-protonation and blue-shifted to 680 nm with di-protonation, suggesting that the mono-cationization of a linear π-conjugated structure bearing two terminal amino groups is an effective strategy for achieving a further red-shift in the λmax. A highly sensitive reusable acid gas sensing textile sensor was fabricated.
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Source Journal
Organic Chemistry Frontiers
CiteScore:
7.8
Self-citation Rate:
8.7%
Articles per Year:
724
Organic Chemistry Frontiers publishes high-quality research from across organic chemistry. Emphases are placed on studies that make significant contributions to the field of organic chemistry by reporting either new or significantly improved protocols or methodologies. Topics include, but are not limited to the following: Organic synthesis Development of synthetic methodologies Catalysis Natural products Functional organic materials Supramolecular and macromolecular chemistry Physical and computational organic chemistry
Recommended Compounds
![(3R,5R)-1-[(Benzyloxy)carbonyl]-5-methyl-3-piperidinecarboxylic acid structure](https://static.chemtradehub.com/structs/126/1269757-29-0-c552.webp "(3R,5R)-1-[(Benzyloxy)carbonyl]-5-methyl-3-piperidinecarboxylic acid structure")
(3R,5R)-1-[(Benzyloxy)carbonyl]-5-methyl-3-piperidinecarboxylic acid
CAS Number:
1269757-29-0
Molecular Formula:
C15H19NO4
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