Reaction of TCNQ (2,5-cyclohexadiene-.DELTA.1,.alpha.:4,.alpha.'-dimalononitrile) with a cobalt(II) Schiff base complex

Nature of the strong electron donor 1,3,6,8-tetrakis(dimethylamino)pyrene and ionicity of its charge transfer complexes

“…Similar down shift of the CMN modes has been reported in [N,N'-ethylenebis(acetylacetoniminato) Co(II){-Co(acacen)}(pyridine) 2 ](TCNQ 21 ), where the n CMN appears at 2171 and 2145 cm 21 . 29 Therefore, no linear relationship is expected between n CMN of the IR spectrum and the degree of CT in the system studied here contrary to that in the conventional TCNQ complexes. 30 The completely ionized nature in both the donors and acceptors is compatible with the insulating conductivity of these complexes.…”

“…It was reported that a dianion of TCNQ molecules exhibited only two CMN stretching frequencies at 2151 and 2102 cm 21 in the solid state [Co(acacen)(pyridine) 2 ] 2 TCNQ. 29 Later three peaks at 2190±2205, 2135±2140 and 2060±2100 cm 21 were observed in a system of (transition metal: V, Cr, Mo, W, Co or Ni)(TCNQ) m (CH 3 CN) n : m~1±2 and n~0±2, where the TCNQ 22 interacts with the highly polarizable metal center with the CMN groups. 33 It was noticed that with a symmetrical compound the band at 2135± 2140 cm 21 disappeared.…”

Impact of Metal-Ion Dependence on the Porous and Electronic Properties of TCNQ-Dianion-Based Porous Coordination Polymers

“…TCNQ is a well-known multiredox active organic molecule that can act as a good acceptor and a weak or a strong donor when its valence is 0, -1, or -2, respectively. [31][32][33][34] In addition, TCNQ is suitable for forming high-dimensional coordination networks because of the coordination and structural diversities based on its multidentate nature and dimerization reaction. [35][36][37][38][39][40][41][42] The TCNQ in the frameworks acts as a good interaction site for guest adsorption and recognition, resulting in it showing unique sorption properties such as selective organic and gas sorption, 30 as well as guest-responsive color changes based on the chargetransfer (CT) interaction.…”

“…We have previously reported several PCPs with 7,7,8,8-tetracyano- p -quinodimethane (TCNQ) as an organic ligand, , focusing on the electrical and structural properties of this organic molecule. TCNQ is a well-known multiredox active organic molecule that can act as a good acceptor and a weak or a strong donor when its valence is 0, −1, or −2, respectively. − In addition, TCNQ is suitable for forming high-dimensional coordination networks because of the coordination and structural diversities based on its multidentate nature and dimerization reaction. − The TCNQ in the frameworks acts as a good interaction site for guest adsorption and recognition, resulting in it showing unique sorption properties such as selective organic and gas sorption, as well as guest-responsive color changes based on the charge-transfer (CT) interaction . In contrast to the organic ligands, the metal ions are not considered to be the important component for the unique porous properties in these PCP systems.…”

Resonance Raman spectroelectrochemistry. 6. Ultraviolet laser excitation of the tetracyanoquinodimethane dianion

“…Found for C12Hi8CoN202: C, 51.07; H, 6.45; N, 9.96. The 2:1 complex of this compound with TCNQ in the presence of pyridine (py), [Co(acacen)(py)2]2TCNQ (3), was prepared according to method 2 of Basolo et al 31 Anal. Caled for C56H6oCo2N|204.• H, 5.54; N, 15.52.…”