“…4 These chargetransfer complexes, based on reduced TCNQ, have attracted broad interest in view of their extensive and often novel electrical, 5,6 electrochemical, [7][8][9] spectroscopic properties, [10][11][12] potential applications in erasable photochromic laser disks and memory storage, [13][14][15] organic field-effect transistors, [16][17][18] biosensors, [19][20][21] conducting 1,4,22 and magnetic properties. [23][24][25][26][27][28][29][30][31][32] In terms of structure, magnetism and electric-field-induced behavior, the most noticeable example is the TCNQ lanthanide complex {[Gd 2 (TCNQ) 5 (H 2 O) 9 ][Gd(TCNQ) 4 (H 2 O) 3 ]}•4H 2 O behaving as a ferrimagnet. 33 Other representative TCNQ transition metal complexes [M(TCNQ)bpy] (M = Fe(II), Zn(II), Mn(II), Co(II), Cd(II), bpy = 4,4′-bipyridyl) are of a 3D network structure which exhibits metal-dependent guest-responsive color changes and electronic properties.…”