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Journal Article

One-dimensional phase transition of dipolar molecules inside zeolite pores


Marlow,  F.
Institut für Angewandte Chemie Berlin-Adlershof, Berlin, Germany;
Research Group Marlow, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Leike, I., & Marlow, F. (1996). One-dimensional phase transition of dipolar molecules inside zeolite pores. Zeolites, 16(1), 65-69. doi:10.1016/0144-2449(95)00100-X.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-487F-B
The thermodynamic behavior of dipolar molecules in a system of parallel straight channels (such as para-nitroaniline (pNA) adsorbed in the channels of AIPO4-5 molecular sieves) was studied theoretically. The interaction between the molecules is considered to be a superposition of long range interaction due to all dipoles in the crystal and nearest-neighbor interaction within the individual pore. The dipoles in a pore are regarded as a one-dimensional system. This leads to a van der Waals-type equation of state. A phase transition exists below the critical temperature. For a real system (pNA in AlPO4-5), the isotherms, the critical point, and the coexistence region are calculated.