1.    L.-N. He^*, J.-S. Tian, C.-X. Miao, F. Cai, J.-Q. Wang, Y. Du, Poly(ethylene glycol)-supported phosphonium halides in combination with inorganic bases/PEG for highly efficient synthesis of dimethyl carbonate from methanol, propylene oxide, and CO₂. Preprints of Symposia - American Chemical Society, Division of Fuel Chemistry, 2006, 51(2), 534-535.

2.    J.-Q. Wang, D.-L. Kong, J.-Y. Chen, F. Cai, L.-N. He,^* Synthesis of cyclic carbonates from epoxides and carbon dioxide over silica-supported quaternary ammonium salts under supercritical conditions, J. Mol. Catal. A: Chem., 2006, 249, 143-148.[link]

3.   Y. Du, J.-Q. Wang, J.-Y. Chen, F. Cai, J.-S. Tian, D.-L. Kong, L.-N. He^*, A poly(ethylene glycol)-supported quaternary ammonium salt for highly efficient and environmentally friendly chemical fixation of CO₂ with epoxides under supercritical conditions, Tetrahedron Lett., 2006, 47(8), 1271-1275. (Most Cited Paper 2006-2009 Award)[link]

Abstract: A PEG-supported quaternary ammonium salt is proved to be an efficient and recyclable homogeneous catalyst for solvent-free synthesis of cyclic carbonates from carbon dioxide and epoxides under supercritical conditions.

4.   J.-S. Tian, J.-Q. Wang, J.-Y. Chen J.-G. Fan, F. Cai, L.-N. He^*, One-pot synthesis of dimethyl carbonate catalyzed by n-Bu₄NBr/ n-Bu₃N from methanol, epoxides, and supercritical CO₂, Appl. Catal. A: Gen., 2006, 301(2), 215-221.[link]

Abstract: Dimethyl carbonate synthesis via one-pot appoarch involving two successive reactions: carbonylation of epoixde followed by transesterification was reported. The best compromise for the one-pot synthesis was achieved with an equimolar amount of tetrabutyl ammonium bromide/ tributylamine. A possible mechanism for the present n-Bu₄NBr/n-Bu₃N-catalyzed one-pot synthesis of DMC was proposed.This process eliminated the separation process and had environmentally benign feature.

5.   H Yasuda, L.-N. He, T. Takahashi, T. Sakakura. Non-halogen catalysts for propylene carbonate synthesis from CO₂ under supercritical conditions, Appl. Catal. A: Gen., 2006, 298, 177-180.[link]