Exploring the nature of surface barriers on MOF Zn(tbip) by applying IR microscopy in high temporal and spatial resolution

被引：44

作者：

Chmelik, Christian ^{[1
]}

Hibbe, Florian ^{[1
]}

Tzoulaki, Despina ^{[1
]}

Heinke, Lars ^{[1
]}

Caro, Juergen ^{[2
]}

Li, Jing ^{[3
]}

Kaerger, Joerg ^{[1
]}

机构：

[1] Univ Leipzig, Dept Expt Phys 1, D-04103 Leipzig, Germany

[2] Leibniz Univ Hannover, Dept Phys Chem & Electrochem, D-30167 Hannover, Germany

[3] Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854 USA

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2010年 / 129卷 / 03期

关键词：

Diffusion; Permeation; Surface barriers; MOF; Zn(tbip); ELASTIC NEUTRON-SCATTERING; INTERFERENCE MICROSCOPY; DIFFUSION; TRANSPORT;

D O I：

10.1016/j.micromeso.2009.06.006

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The options of IR microscopy for monitoring the evolution of guest (propane) profiles in nanoporous materials (MOF Zn(tbip)) during transient sorption experiments are exploited in a phenomenological Study of the formation and variation of transport resistances on the surface of these materials ("surface barriers"). Novel crystal faces, produced by a simple breaking of the crystals, are found to exhibit notably reduced surface resistances while, with increasing time of storage under ambient atmosphere, the surface resistances are found to be enhanced. Differences in the permeabilities oil opposite crystal faces appear in a notable asymmetry in the transient concentration profiles. Symmetry is re-established in crystals with two fresh fracture faces. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：340 / 344

页数：5

共 25 条

[1] Understanding diffusion in nanoporous materials [J].

Beerdsen, E ;

Dubbeldam, D ;

Smit, B .

PHYSICAL REVIEW LETTERS, 2006, 96 (04)

[2] Nonequilibrium molecular dynamics simulations of diffusion of binary mixtures containing short n-alkanes in faujasite [J].

Chempath, S ;

Krishna, R ;

Snurr, RQ .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (35) :13481-13491

[3]

Crank J., 1979, MATH DIFFUSION, V2nd

[4] Understanding diffusion in confined systems: Methane in a ZK4 molecular sieve. A molecular dynamics simulation study [J].

Demontis, P ;

Fenu, LA ;

Suffritti, GB .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (38) :18081-18087

[5]

Griffiths P.R., 1986, FOURIER TRANSFORM IN

[6]

HEINKE L, 2008, DIFFUS FUNDAM, V9

[7] Application of interference microscopy and IR microscopy for characterizing and investigating mass transport in nanoporous materials [J].

Heinke, Lars ;

Chmelik, Christian ;

Kortunov, Pavel ;

Ruthven, Douglas M. ;

Shah, Dhananjai B. ;

Vasenkov, Sergey ;

Kaerger, Joerg .

CHEMICAL ENGINEERING & TECHNOLOGY, 2007, 30 (08) :995-1002

[8] Assessing Guest Diffusivities in Porous Hosts from Transient Concentration Profiles [J].

Heinke, Lars ;

Tzoulaki, Despina ;

Chmelik, Christian ;

Hibbe, Florian ;

van Baten, Jasper M. ;

Lim, Hyuna ;

Li, Jing ;

Krishna, Rajamani ;

Kaerger, Joerg .

PHYSICAL REVIEW LETTERS, 2009, 102 (06)

[9] Assessing one-dimensional diffusion in nanoporous materials from transient concentration profiles [J].

Heinke, Lars ;

Kaerger, Joerg .

NEW JOURNAL OF PHYSICS, 2008, 10

[10]

Jobic H, 2008, MOL SIEVES SCI TECHN, V7, P207, DOI 10.1007/3829_2007_012

← 1 2 3 →