State Key Laboratory of Coordination Chemistry;
Institute of Coordination Chemistry;
Nanjing University;
Nanjing 210093;
China;
Shanxi Academy of Agricultural Sciences;
Taiyuan 030031;
China;
Institute of Molecular Science;
Shanxi University;
Taiyuan 030006;
China;
triangular; field; rare; earth; complexes; coordination; field; theory; spectral; analysis;