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Photochem Photobiol A: Chem 207:38–46
17. Wang L, Li Y, Zhang Y, He H, Zhang J (2015) Spectrochim Acta Mol Biomol Spectrosc
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18. Gardinier JR, Pellechia PJ, Smith MD (2005) Ionic rotors. preparation, structure, and dynamic
solid-state 2 D NMR study of the 1,4-diethynylbenzenebis(triphenylborate) dianion. J Am Chem
Soc 127:12448–12449
19. Xia WS, Schmehl RH, Li CJ (2000) A fluorescent 18-crown-6 based luminescence sensor for
lanthanide ions. Tetrahedron 56:7045–7049
20. Sheldrick GM (2013) SHELXL-2013. Program for the refinement of crystal structures.
University of Göttingen, Göttingen, Germany
21. Frisch MJ et al (2009) Gaussian 09 revision C.01. Gaussian Inc, Wallingford, CT
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191
16. Yang J-S, Yan JL, Liau K-L, Tsai HHG, Hwang C-YJ (2009) Substituent effect on the groundand excited-state torsional motions of pentiptycene-derived 1,4-bis(phenylethynyl)benzenes. J
Photochem Photobiol A: Chem 207:38–46
17. Wang L, Li Y, Zhang Y, He H, Zhang J (2015) Spectrochim Acta Mol Biomol Spectrosc
2015(137):259
18. Gardinier JR, Pellechia PJ, Smith MD (2005) Ionic rotors. preparation, structure, and dynamic
solid-state 2 D NMR study of the 1,4-diethynylbenzenebis(triphenylborate) dianion. J Am Chem
Soc 127:12448–12449
19. Xia WS, Schmehl RH, Li CJ (2000) A fluorescent 18-crown-6 based luminescence sensor for
lanthanide ions. Tetrahedron 56:7045–7049
20. Sheldrick GM (2013) SHELXL-2013. Program for the refinement of crystal structures.
University of Göttingen, Göttingen, Germany
21. Frisch MJ et al (2009) Gaussian 09 revision C.01. Gaussian Inc, Wallingford, CT
22. Spartan’10. Wavefunction, Inc, Irvine, CA
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