ICCAS OpenIR
NMR relaxation times of alkanethiol monolayer self-assembling on nano-scale gold particles
Yang, XR; Wang, TX; Zhang, DQ; Tang, YL; Li, LP; Hou, KY
2002-09-01
Source PublicationACTA CHIMICA SINICA
ISSN0567-7351
Volume60Issue:9Pages:1575-1580
AbstractThe motion of alkanethiol ligand molecules self-assembling on nano-scale gold particles was studied by measuring the spin-lattice relaxation time ( T-1) and spin-spin relaxation time ( T-2). Two types of ligands, Py(CH2)(12)SH and CH3(CH2)(7)SH as well as their mixtures of different ratio are employed in this work. NMR relaxation times of four protons at different positions versus steric effect and mixing proportion in ligand mixtures were monitored. Due to different influences of various factors, each of these protons show different motion characteristics. For the ligands, connected with Au particle, NMR T, and T2 at position 2 and 3 decrease whereas those at position 1 and 4 increase. For the mixed ligands, with increasing of Py(CH2)(12)SH content, T-1 and T-2 at position 1, 2, 3 and T-1 at position 4 decrease, while NMR T-2 at position 4 increases. However, protons at different positions have different T-1 and T-2 variation speeds. The proton at position 2, due to its special location, has the largest flexibility in the motion with ligands mixing ratio PY: C-8 = 1:1 [PY represents Py(CH2)(12)SH; C-8 represents CH3(CH2)(7)SH]. The experimental results also show that T-1 is always greater than the corresponding T-2, which indicates that ligands is in low frequency motion region in the system investigated.
KeywordAlkanethiol Monolayer Nano-scale Gold Particle Nmr Relaxation Time Motion Of Ligand Molecule
Indexed BySCI
Language英语
WOS IDWOS:000178292400007
PublisherSCIENCE CHINA PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/79124
Collection中国科学院化学研究所
Corresponding AuthorYang, XR
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Yang, XR,Wang, TX,Zhang, DQ,et al. NMR relaxation times of alkanethiol monolayer self-assembling on nano-scale gold particles[J]. ACTA CHIMICA SINICA,2002,60(9):1575-1580.
APA Yang, XR,Wang, TX,Zhang, DQ,Tang, YL,Li, LP,&Hou, KY.(2002).NMR relaxation times of alkanethiol monolayer self-assembling on nano-scale gold particles.ACTA CHIMICA SINICA,60(9),1575-1580.
MLA Yang, XR,et al."NMR relaxation times of alkanethiol monolayer self-assembling on nano-scale gold particles".ACTA CHIMICA SINICA 60.9(2002):1575-1580.
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