Cholesterol–based Bisamides on Biphenyl Backbone: A Case of Selective Visual Sensing of F −  and H 2 PO 4  −  through Breaking and Making of Gels | Zendy

Ghosh Kumaresh | Zendy; Panja Santanu | Zendy

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Cholesterol–based Bisamides on Biphenyl Backbone: A Case of Selective Visual Sensing of F − and H 2 PO 4 − through Breaking and Making of Gels

Author(s) -

Ghosh Kumaresh,

Panja Santanu

Publication year - 2016

Publication title -

chemistryselect

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.437

H-Index - 34

ISSN - 2365-6549

DOI - 10.1002/slct.201600238

Subject(s) - biphenyl , pyridinium , chemistry , solvent , silica gel , chloride , ion , hexane , salt (chemistry) , medicinal chemistry , nuclear chemistry , chromatography , organic chemistry

Cholesterol linked bisamides 1–3 on biphenyl spacers have been designed and synthesized. Compound 1 forms gel in CHCl 3 – n‐hexane (1:6, v/v) solvent and the gel is selectively collapsed into sol in presence of F − with a color change from yellowish white to greenish yellow. Presence of pyridinium amides in 2 and 3 showed different gelation behaviours. While the chloride salt 2 displayed gelation in CHCl 3 in presence of H 2 PO 4 − , compound 3 formed gel in DMSO: H 2 O (1:2, v/v) without having any assistance of externally added anion. The gel derived from 3 underwent rapid gel to sol transition in presence of H 2 PO 4 − and F − anions and validated their visual sensing.

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