Citation: Nong Yue HE, Chun YANG, Jian Xin TANG, Peng Feng XIAO, Hong CHEN. An Empiric Linear Formula between the Internal Tetrahedron Symmetric Stretch Frequency and the Al Content in the Framework of KL Molecular Sieves[J]. Chinese Chemical Letters, ;2003, 14(8): 870-873. shu

An Empiric Linear Formula between the Internal Tetrahedron Symmetric Stretch Frequency and the Al Content in the Framework of KL Molecular Sieves

1.
Key Lab of New Materials and Technology of China National Packaging Corporation, Zhuzhou Engineering College, Zhuzhou 412008;
2.
Key Laboratory for Molecular and Biomolecular Electronics of Ministry of Education, Southeast University, Nanjing 210096;
3.
Department of Chemistry, Nanjing Normal University, Nanjing 210097

Received Date: 20 March 2002
Revised Date: 23 April 2003

Fund Project: This research is supported by the National Natural Science Foundation of China (60071001), the Excellent Teacher’s Foundation of Ministry of Education, China, Natural Science Foundation of Hunan Province (01jjy3004), Education Committee of Hunan Province (01C343).

KL molecular sieves with different framework compositions were secondarily synthesized by substituting Si for Al with a solution of (NH₄)₂SiF₆. The internal tetrahedron symmetric stretch frequency, at ~770 cm^-1, is linear with the molar fraction of Al (X_Al=Al/(Si+Al)) in the framework of KL samples:X_Al=-7.309×10^-3 (υ₇₇₀-760)+0.3242.
- KL molecular sieve,
- infrared spectroscopy,
- linearity,
- framework composition
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