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Synthesis and properties of sulfur-functionalized triarylmethylium, acridinium and triangulenium dyes.

ABSTRACT: Triangulenium dyes functionalized with one, two or three ethylthiol functionalities were synthesized and their optical properties were studied. The sulfur functionalities were introduced by aromatic nucleophilic substitution of methoxy groups in triarylmethylium cations with ethanethiol followed by partial or full ring closure of the ortho positions with nitrogen or oxygen bridges leading to sulfur-functionalized acridinium, xanthenium or triangulenium dyes. For all the dye classes the sulfur functionalities are found to lead to intensely absorbing dyes in the visible range (470 to 515 nm), quite similar to known analogous dye systems with dialkylamino donor groups in place of the ethylthiol substituents. For the triangulenium derivatives significant fluorescence was observed (?f = 0.1 to ?f = 0.3).

SUBMITTER: Santella M

PROVIDER: S-EPMC6753677 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Synthesis and properties of sulfur-functionalized triarylmethylium, acridinium and triangulenium dyes.

Santella Marco M Della Pia Eduardo E Sørensen Jakob Kryger JK Laursen Bo W BW

Beilstein journal of organic chemistry 20190909

Triangulenium dyes functionalized with one, two or three ethylthiol functionalities were synthesized and their optical properties were studied. The sulfur functionalities were introduced by aromatic nucleophilic substitution of methoxy groups in triarylmethylium cations with ethanethiol followed by partial or full ring closure of the <i>ortho</i> positions with nitrogen or oxygen bridges leading to sulfur-functionalized acridinium, xanthenium or triangulenium dyes. For all the dye classes the su ...[more]

PMID: 31579076

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