Effect of organic functional groups on the phase transition of organic liquids in silica mesopores

The phase transition behaviors of organic liquids condensed in the silica mesopores which modified with organic functional groups have been investigated. Three organic liquids, n-hexane, 1-hexanol and acetonitrile, were employed. The melting points of the organic liquids in the pores with and without the organic functional groups decreased with decreasing the pore size. The effect of the organic functional groups on the change in the physical properties of the organic condensed liquids in the pores was estimated from a depression of the melting point. The phase transition behaviors of the organic liquids in the pores closely related to the interaction between the organic molecules and the pore surfaces.

[1]  Gabriel Tkacik,et al.  Characterization of porous sublayers in UF membranes by thermoporometry , 1987 .

[2]  J. B. Higgins,et al.  A new family of mesoporous molecular sieves prepared with liquid crystal templates , 1992 .

[3]  N. Mameri,et al.  THE STUDY OF THE SWELLING OF AN ULTRAFILTRATION MEMBRANE UNDER THE INFLUENCE OF SOLVENTS BY THERMOPOROMETRY AND MEASUREMENT OF PERMEABILITY , 1991 .

[4]  M. Barrow.  α-Acetonitrile at 215 K , 1981 .

[5]  M. Todoki,et al.  Pore Size Distribution Measurements of Silica Gels by Means of Differential Scanning Calorimetry: II. Thermoporosimetry , 1995 .

[6]  K. Tsutsumi,et al.  Studies of surface modification of solids , 1985 .

[7]  Charles Eyraud,et al.  A new method for the simultaneous determination of the size and shape of pores: the thermoporometry , 1977 .

[8]  M. Fuji,et al.  Anomalous phase transition behavior of carbon tetrachloride in silica pores , 2000 .

[9]  Egon Matijević,et al.  Chemistry of silica , 1980 .

[10]  Lesile Glasser.  The chemistry of silica: By Ralph K. Iller. Pp. vii+ 866. Wiley, Chichester. 1979, £39.50 , 1980 .

[11]  Koichi Iwakabe,et al.  Characterization of Nonfreezable Pore Water in Mesoporous Silica by Thermoporometry , 2008 .

[12]  Marie Wulff,et al.  Pore size determination by thermoporometry using acetonitrile , 2004 .

[13]  K. Sing,et al.  Adsorption by Powders and Porous Solids: Principles, Methodology and Applications , 1998 .

[14]  Shantanu Sinha,et al.  Porous vycor glass: The microstructure as probed by electron microscopy, direct energy transfer, small-angle scattering, and molecular adsorption , 1991 .

[15]  M. Todoki,et al.  Pore Size Distribution (PSD) Measurements of Silica Gels by Means of Differential Scanning Calorimetry: I. Optimization for Determination of PSD , 1995 .

[16]  M. Fantini,et al.  DSC estimation of structural and textural parameters of SBA-15 silica using water probe , 2009 .

[17]  J. Nedelec,et al.  Universal behavior of linear alkanes in a confined medium: toward a calibrationless use of thermoporometry. , 2005, The journal of physical chemistry. B.

[18]  A. Yamazaki,et al.  Water adsorption properties on porous silica glass surface modified by trimethylsilyl groups , 1997 .

[19]  S. Haukka,et al.  The reaction of hexamethyldisilazane and subsequent oxidation of trimethylsilyl groups on silica studied by solid-state NMR and FTIR , 1994 .

[20]  I. Matko,et al.  Rearrangement of hexadecane molecules confined in the nanopores of a controlled pore glass using positron annihilation and differential scanning calorimetry , 2013, Journal of Thermal Analysis and Calorimetry.

[21]  K. Sing,et al.  CHAPTER 7 – Assessment of Mesoporosity , 1999 .

[22]  M. Fuji,et al.  Phase transition of capillary condensed liquids in porous silica : effect of surface hydroxyl groups , 1995 .

[23]  Crystallization of carbon tetrachloride in confined geometries. , 2007, Faraday discussions.

[24]  J. Salonen,et al.  Utilising thermoporometry to obtain new insights into nanostructured materials , 2011 .

[25]  Toshinori Mori,et al.  Low temperature properties of acetonitrile confined in MCM-41. , 2005, The journal of physical chemistry. B.

[26]  Eric A. Grulke.  Solubility Parameter Values , 1999 .

[27]  J. Nedelec,et al.  Thermoporosimetry: A powerful tool to study the cross-linking in gels networks , 2006 .

[28]  Michael R. Landry,et al.  Thermoporometry by differential scanning calorimetry: experimental considerations and applications , 2005 .

[29]  N. Andersen,et al.  Neutron powder diffraction study of deuterated β‐acetonitrile , 1987 .

[30]  R. Denoyel,et al.  A comparison between melting-solidification and capillary condensation hysteresis in mesoporous materials: application to the interpretation of thermoporometry data , 2004 .