Selective adsorption of L-tartaric acid on gemini-type self-assembled monolayers

Lloyd F.N. Ah Qune; Kenji Makino; Kaoru Tamada; Wei Chen; Andrew T.S. Wee

doi:10.1021/jp076785d

Selective adsorption of L-tartaric acid on gemini-type self-assembled monolayers

Lloyd F.N. Ah Qune, Kenji Makino, Kaoru Tamada, Wei Chen, Andrew T.S. Wee

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Synchrotron photoelectron spectroscopy and X-ray absorption spectroscopy studies of cationic self-assembled monolayers (SAMs) of quaternary ammonium (QA) sulfur derivates prepared on gold substrates were performed to investigate the adsorption mechanism of L-tartaric acid on a gemini-structured didodecyl dithiol (HS-gQA-SH). Using soft X-rays from a synchrotron light source, the carboxylate (deprotonated carboxylic acid) of L-tartaric acid was found to undergo an exchange reaction with the native bromide counterion of HS-gQA-SH-SAM. We also report the first soft XPS spectra of the bromide counterion of the QA. These results indicate the necessary chemical architecture via distance matching for exchange reactions to occur between complex molecules and point the way to more effective molecular recognition systems.

Original language	English
Pages (from-to)	3049-3053
Number of pages	5
Journal	Journal of Physical Chemistry C
Volume	112
Issue number	8
DOIs	https://doi.org/10.1021/jp076785d
Publication status	Published - Feb 28 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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abstract = "Synchrotron photoelectron spectroscopy and X-ray absorption spectroscopy studies of cationic self-assembled monolayers (SAMs) of quaternary ammonium (QA) sulfur derivates prepared on gold substrates were performed to investigate the adsorption mechanism of L-tartaric acid on a gemini-structured didodecyl dithiol (HS-gQA-SH). Using soft X-rays from a synchrotron light source, the carboxylate (deprotonated carboxylic acid) of L-tartaric acid was found to undergo an exchange reaction with the native bromide counterion of HS-gQA-SH-SAM. We also report the first soft XPS spectra of the bromide counterion of the QA. These results indicate the necessary chemical architecture via distance matching for exchange reactions to occur between complex molecules and point the way to more effective molecular recognition systems.",

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T1 - Selective adsorption of L-tartaric acid on gemini-type self-assembled monolayers

AU - Ah Qune, Lloyd F.N.

AU - Makino, Kenji

AU - Tamada, Kaoru

AU - Chen, Wei

AU - Wee, Andrew T.S.

PY - 2008/2/28

Y1 - 2008/2/28

N2 - Synchrotron photoelectron spectroscopy and X-ray absorption spectroscopy studies of cationic self-assembled monolayers (SAMs) of quaternary ammonium (QA) sulfur derivates prepared on gold substrates were performed to investigate the adsorption mechanism of L-tartaric acid on a gemini-structured didodecyl dithiol (HS-gQA-SH). Using soft X-rays from a synchrotron light source, the carboxylate (deprotonated carboxylic acid) of L-tartaric acid was found to undergo an exchange reaction with the native bromide counterion of HS-gQA-SH-SAM. We also report the first soft XPS spectra of the bromide counterion of the QA. These results indicate the necessary chemical architecture via distance matching for exchange reactions to occur between complex molecules and point the way to more effective molecular recognition systems.

AB - Synchrotron photoelectron spectroscopy and X-ray absorption spectroscopy studies of cationic self-assembled monolayers (SAMs) of quaternary ammonium (QA) sulfur derivates prepared on gold substrates were performed to investigate the adsorption mechanism of L-tartaric acid on a gemini-structured didodecyl dithiol (HS-gQA-SH). Using soft X-rays from a synchrotron light source, the carboxylate (deprotonated carboxylic acid) of L-tartaric acid was found to undergo an exchange reaction with the native bromide counterion of HS-gQA-SH-SAM. We also report the first soft XPS spectra of the bromide counterion of the QA. These results indicate the necessary chemical architecture via distance matching for exchange reactions to occur between complex molecules and point the way to more effective molecular recognition systems.

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Selective adsorption of L-tartaric acid on gemini-type self-assembled monolayers

Abstract

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