The Condensation Process of Alcohol Molecules in the Nanochannel of MCM-41:  A Spin-Probe ESR Study

2008 ◽  
Vol 112 (3) ◽  
pp. 786-793 ◽  
Author(s):  
Masaharu Okazaki ◽  
Shinpei Iwamoto ◽  
Yoshimi Sueishi ◽  
Kazumi Toriyama
Keyword(s):  
Spin Probe ◽  
Condensation Process ◽  
Mcm 41

Properties of the Silica Layer during the Formation of MCM-41 Studied by EPR of a Silica-Bound Spin Probe

2005 ◽  
Vol 109 (16) ◽  
pp. 7807-7816 ◽  
Author(s):  
Debbie Baute ◽  
Veronica Frydman ◽  
Herbert Zimmermann ◽  
Shifi Kababya ◽  
Daniella Goldfarb
Keyword(s):  
Spin Probe ◽  
Silica Layer ◽  
Mcm 41

Spin-Probe ESR Study on the Entrapment of Organic Solutes by the Nanochannel of MCM-41 in Benzene

Langmuir ◽  
2007 ◽  
Vol 23 (3) ◽  
pp. 1215-1222 ◽  
Author(s):  
Masaharu Okazaki ◽  
Sambandam Anandan ◽  
Sindhu Seelan ◽  
Masakazu Nishida ◽  
Kazumi Toriyama
Keyword(s):  
Spin Probe ◽  
Organic Solutes ◽  
Mcm 41

Spin-Probe Study on the Dynamics and Distribution of Solution Molecules in the Nano-Channel of MCM-41

2004 ◽  
Vol 77 (1) ◽  
pp. 87-93 ◽  
Author(s):  
Masaharu Okazaki ◽  
Kazumi Toriyama ◽  
Naoya Sawaguchi ◽  
Kiichi Oda
Keyword(s):  
Spin Probe ◽  
Nano Channel ◽  
Mcm 41

scholarly journals Field-induced Director Alignment of MCM-41/liquid crystals

2014 ◽  
Vol 8 (1) ◽  
Author(s):  
Leaw Wai Loon ◽  
Che Rozid Mamat
Keyword(s):  
Liquid Crystal ◽  
Electron Spin Resonance ◽  
Order Parameter ◽  
Spin Probe ◽  
Orientational Order ◽  
Orientational Order Parameter ◽  
Spin Resonance ◽  
Disorder Effect ◽  
Random Disorder ◽  
Mcm 41

We report on the random disorder effect of MCM-41 on the order of the 3β-DOXYL-5α-cholestane (CLS) spin probe in the ZLI-4792 liquid crystal using Electron Spin Resonance (ESR) technique. In different MCM-41 concentrations, the temperature dependence of the director orientational order parameter,

Copper tellurolate clusters in trimethylsilylated MCM-41 — Preparation and condensation

2006 ◽  
Vol 84 (2) ◽  
pp. 196-204 ◽  
Author(s):  
Collin M Kowalchuk ◽  
Harald Rösner ◽  
Dieter Fenske ◽  
Yining Huang ◽  
John F Corrigan
Keyword(s):  
Nmr Spectroscopy ◽  
Sorption Isotherms ◽  
Nitrogen Adsorption ◽  
Mas Nmr ◽  
Condensation Process ◽  
X Ray ◽  
Edx Analysis ◽  
Transmission Electron ◽  
Cp Mas Nmr ◽  
Mcm 41

The copper tellurolate cluster [(Cu6(TePh)6(PEtPh2)5] (1) has been loaded into the pores of a trimethylsilylated MCM-41 (TMS–MCM-41) framework. Solutions of 1 in tetrahydrofuran lead to good impregnation weight % (~10 wt%, 1). The resulting material was analysed by powder X-ray diffraction (PXRD), nitrogen sorption isotherms, thermogravimetric analysis (TGA), energy dispersive X-ray (EDX) analysis, 31P CP MAS NMR spectroscopy, and transmission electron microscopy (TEM). It was observed that the loading process proceeds with the intact cluster 1 being present within the hexagonal architecture. The intact nature of 1 makes it an ideal candidate for condensation by photochemical or thermal means. Both of these condensation treatments increase the Cu:Te ratio of 1 to approach that observed in binary semiconductor Cu2Te. The condensation process was analysed by GC–MS spectrometry and characterization of the condensed, isolated composites was performed by TGA, EDX analysis, 31P CP MAS NMR spectroscopy, nitrogen adsorption, and TEM measurements. Thermal condensation results in the formation of Cu2Te particles, whereas photochemical condensation yields larger copper-tellurolate nanoclusters.Key words: copper, tellurium, cluster, MCM-41, trimethylsilylated, photolysis, thermolysis, Cu2Te, composite, mesoporous material.

scholarly journals Molecular probe dynamics and free volume heterogeneities in n-propanol confined in a regular MCM-41 matrix by ESR and PALS

RSC Advances ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 2283-2294 ◽  
Author(s):  
Josef Bartoš ◽  
Helena Švajdlenková ◽  
Ondrej Šauša
Keyword(s):  
Free Volume ◽  
Spin Probe ◽  
Molecular Probe ◽  
Mcm 41

A combined investigation of the spin probe TEMPO mobility and the free volume holes in n-propanol (n-PrOH) confined in a regular virgin MCM-41 matrix by means of ESR or PALS techniques, respectively, is reported.

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