Monitoring the functionalization of single-walled carbon nanotubes with chitosan and folic acid by two-dimensional diffusion-ordered nmr spectroscopy

John J. Castillo; Mary H. Torres; Daniel R. Molina; Jaime Castillo; Winnie Edith Svendsen; Patricia Escobar; Fernando Martínez O

doi:10.1016/j.carbon.2012.02.010

Monitoring the functionalization of single-walled carbon nanotubes with chitosan and folic acid by two-dimensional diffusion-ordered nmr spectroscopy

John J. Castillo, Mary H. Torres, Daniel R. Molina, Jaime Castillo, Winnie Edith Svendsen, Patricia Escobar, Fernando Martínez O

Universidad Industrial de Santander

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

A conjugate between single-walled carbon nanotubes, chitosan and folic acid has been prepared. It was characterized by diffusion ordered two-dimensional hydrogen-1 nuclear magnetic resonance and hydrogen-1 nuclear magnetic resonance spectroscopy which revealed the presence of a conjugate that was generated by the linkage between the carboxyl moiety of the folic acid and the amino group of the chitosan, which in turn was non-covalently bound to the single-walled carbon nanotubes. The obtained diffusion coefficient values demonstrated that free folic acid diffused more rapidly than the folic acid conjugated to single-walled carbon nanotubes-chitosan. The values of the proton signal of hydrogen-1 nuclear magnetic resonance spectroscopy and two-dimensional hydrogen-1 nuclear magnetic resonance spectroscopy further confirmed that the folic acid was conjugated to the chitosan, wrapping the single-walled carbon nanotubes.

Original language	English
Journal	Carbon
Volume	50
Pages (from-to)	2691-2697
ISSN	0008-6223
DOIs	https://doi.org/10.1016/j.carbon.2012.02.010
Publication status	Published - 2012

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10.1016/j.carbon.2012.02.010

Castillo 2012 Monitoring the functionalization of SWCNTs with chitosan and folic acid by 2D diffsuion-ordered NMR spectroscopy

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title = "Monitoring the functionalization of single-walled carbon nanotubes with chitosan and folic acid by two-dimensional diffusion-ordered nmr spectroscopy",

abstract = "A conjugate between single-walled carbon nanotubes, chitosan and folic acid has been prepared. It was characterized by diffusion ordered two-dimensional hydrogen-1 nuclear magnetic resonance and hydrogen-1 nuclear magnetic resonance spectroscopy which revealed the presence of a conjugate that was generated by the linkage between the carboxyl moiety of the folic acid and the amino group of the chitosan, which in turn was non-covalently bound to the single-walled carbon nanotubes. The obtained diffusion coefficient values demonstrated that free folic acid diffused more rapidly than the folic acid conjugated to single-walled carbon nanotubes-chitosan. The values of the proton signal of hydrogen-1 nuclear magnetic resonance spectroscopy and two-dimensional hydrogen-1 nuclear magnetic resonance spectroscopy further confirmed that the folic acid was conjugated to the chitosan, wrapping the single-walled carbon nanotubes.",

author = "Castillo, {John J.} and Torres, {Mary H.} and Molina, {Daniel R.} and Jaime Castillo and Svendsen, {Winnie Edith} and Patricia Escobar and {Mart{\'i}nez O}, Fernando",

year = "2012",

doi = "10.1016/j.carbon.2012.02.010",

language = "English",

volume = "50",

pages = "2691--2697",

journal = "Carbon",

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T1 - Monitoring the functionalization of single-walled carbon nanotubes with chitosan and folic acid by two-dimensional diffusion-ordered nmr spectroscopy

AU - Castillo, John J.

AU - Torres, Mary H.

AU - Molina, Daniel R.

AU - Castillo, Jaime

AU - Svendsen, Winnie Edith

AU - Escobar, Patricia

AU - Martínez O, Fernando

PY - 2012

Y1 - 2012

N2 - A conjugate between single-walled carbon nanotubes, chitosan and folic acid has been prepared. It was characterized by diffusion ordered two-dimensional hydrogen-1 nuclear magnetic resonance and hydrogen-1 nuclear magnetic resonance spectroscopy which revealed the presence of a conjugate that was generated by the linkage between the carboxyl moiety of the folic acid and the amino group of the chitosan, which in turn was non-covalently bound to the single-walled carbon nanotubes. The obtained diffusion coefficient values demonstrated that free folic acid diffused more rapidly than the folic acid conjugated to single-walled carbon nanotubes-chitosan. The values of the proton signal of hydrogen-1 nuclear magnetic resonance spectroscopy and two-dimensional hydrogen-1 nuclear magnetic resonance spectroscopy further confirmed that the folic acid was conjugated to the chitosan, wrapping the single-walled carbon nanotubes.

AB - A conjugate between single-walled carbon nanotubes, chitosan and folic acid has been prepared. It was characterized by diffusion ordered two-dimensional hydrogen-1 nuclear magnetic resonance and hydrogen-1 nuclear magnetic resonance spectroscopy which revealed the presence of a conjugate that was generated by the linkage between the carboxyl moiety of the folic acid and the amino group of the chitosan, which in turn was non-covalently bound to the single-walled carbon nanotubes. The obtained diffusion coefficient values demonstrated that free folic acid diffused more rapidly than the folic acid conjugated to single-walled carbon nanotubes-chitosan. The values of the proton signal of hydrogen-1 nuclear magnetic resonance spectroscopy and two-dimensional hydrogen-1 nuclear magnetic resonance spectroscopy further confirmed that the folic acid was conjugated to the chitosan, wrapping the single-walled carbon nanotubes.

U2 - 10.1016/j.carbon.2012.02.010

DO - 10.1016/j.carbon.2012.02.010

M3 - Journal article

SN - 0008-6223

VL - 50

SP - 2691

EP - 2697

JO - Carbon

JF - Carbon

ER -

Monitoring the functionalization of single-walled carbon nanotubes with chitosan and folic acid by two-dimensional diffusion-ordered nmr spectroscopy

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