Hydrogen cluster/network in tobermorite as studied by multiple-quantum spin counting {sup 1}H NMR

Proton multiple-quantum (MQ) spin-counting experiment has been employed to study arrangement of hydrogen atoms in 9 Å/11 Å natural/synthetic tobermorites. Even though all tobermorite samples give similar characterless, broad static-powder {sup 1}H NMR spectra, their MQ spin-counting spectra are mark...

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Published in:Cement and concrete research 2014-12, Vol.66
Main Authors: Mogami, Yuuki, Yamazaki, Satoru, Matsuno, Shinya, Matsui, Kunio, Noda, Yasuto, Takegoshi, K.
Format: Article
Language:English
Subjects:
CALCIUM SILICATES
EXCITATION
HEAT TREATMENTS
HYDRATES
HYDROGEN
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
MATERIALS SCIENCE
MICROSTRUCTURE
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
POWDERS
PROTONS
SPECTROSCOPY
SPIN
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container_title Cement and concrete research
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creator Mogami, Yuuki
Yamazaki, Satoru
Matsuno, Shinya
Matsui, Kunio
Noda, Yasuto
Takegoshi, K.
description Proton multiple-quantum (MQ) spin-counting experiment has been employed to study arrangement of hydrogen atoms in 9 Å/11 Å natural/synthetic tobermorites. Even though all tobermorite samples give similar characterless, broad static-powder {sup 1}H NMR spectra, their MQ spin-counting spectra are markedly different; higher quanta in 11 Å tobermorite do not grow with the MQ excitation time, while those in 9 Å one do. A statistical analysis of the MQ results recently proposed [26] is applied to show that hydrogens align in 9 Å tobermorite one dimensionally, while in 11 Å tobermorite they exist as a cluster of 5–8 hydrogen atoms.
doi_str_mv 10.1016/J.CEMCONRES.2014.07.023
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subjects CALCIUM SILICATES
EXCITATION
HEAT TREATMENTS
HYDRATES
HYDROGEN
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
MATERIALS SCIENCE
MICROSTRUCTURE
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
POWDERS
PROTONS
SPECTROSCOPY
SPIN
title Hydrogen cluster/network in tobermorite as studied by multiple-quantum spin counting {sup 1}H NMR
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