Structure and spectral properties of TCNQ salts with Zn(II) and Ni(II) 2,2′-bipyridine complexes

• Crystal structure of three new anion radical salts of TCNQ with Zn(II) and Ni(II) complexes has been determined.
• Infrared reflection and absorption spectra has been recorded.
• Raman scattering spectra of single crystals has been recorded.
• Assignment of the observed vibrational features has been proposed.

Three new anion-radical TCNQ salts with Zn and Ni 2,2′-bipyridine complexes and appropriate solvent were synthesized as well as structurally and spectrally investigated. Two of the salts show quasi-one dimensional organization of the anions and show distinct anisotropy of the polarized reflection spectra. Both infrared and Raman spectra were extensively investigated using various spectral methods and discussed. The origin of principal absorption IR bands as well as Raman scattering lines was explained according to our quantum chemical calculations.