12369-74-3Relevant academic research and scientific papers
Preparation of Bis(phthalocyaninato)lutetium with Various Substituts and Their Electochemical Properties
Liu, Yunqi,Shigehara, Kiyotaka,Yamada, Akira
, p. 250 - 257 (1992)
A series of bis(phthalocyaninato)lutetium complexes with substituents on each benzoring 2R8)> was prepared and the electrochromic behavior investigated by means of cyclic voltammetry of coated electrodes.Although the unsubstituted complex, Lu(pc)2, showed multistep electrochromism, its stability was quite unsatisfactory due to a falling-off of films from the electrode surface upon repetitive potential scanning.In the case of R=t-butyl, the improved solubility in organic solvents brought about an easier filming process and better adhesion to the electrode surface, though its high oxidation potential caused a cleavage of bi-peripheral complex.In contrast, complexes with electron-donating groups, such as R = propoxy or neopentyloxy, showed a lower oxidation potential and better stability upon repetitive scans, though the oxidized color was brownish rather than bright red.Complexes with 4 groups each of tetra-t-butyl and tetra propoxy had the oxidation potential close to that of octapropoxy or octakis(neopentyloxy) complexes and showed much improved stability and electrochromic behavior.
Synthesis, structure, and spectroscopic properties of the reduced and reduced protonated forms of lutetium diphthalocyanine
Moussavi, Mehdi,De Cian, André,Fischer, Jean,Weiss, Raymond
, p. 1287 - 1291 (2008/10/08)
The synthesis of the bis(phthalocyaninato)hitetium(III) derivatives [LuPc2][Na?18c.6] (1, C76H56N16NaLu; 18c.6 = 18-crown-6), [LuPc2][NBu4] (2, C80H68N17Lu), and [LuHPc2] (3, C64H33N16Lu) is reported. These compounds were characterized by electronic and 1H NMR spectroscopy. The mass spectrum of [LuHPc2] (3) shows a difference of one mass unit from that of [LuPc2]. 2 crystallizes with two DMF molecules of solvation in the triclinic system, with a = 22.390 (8) ?, b = 15.371 (6) ?, c = 11.590 (4) ?, α = 109.35 (2)°, β = 95.33 (2)°, γ = 92.54 (2)°, Z = 2, and space group P1. 3 belongs to the orthorhombic system, with a = 10.567 (3) ?, b = 50.683 (9) ?, c = 8.849 (3) ?, Z = 4, and space group P212121. The crystals of 2 contain sandwich-type anions [LuPc2]- in which the lutetium is, as in [LuPc2], eightfold coordinated by the isoindole nitrogens (Niso) of two staggered phthalocyanine rings. The mean value of the Lu-Niso bond distances with one ring is 2.374 (2) ? whereas the average value of the Lu-Niso bond lengths with the other ring is 2.392 (2) ?. A sandwich-type structure is also present in the [LuHPc2] molecules (3). The mean value of the Lu-Niso bond lengths with one ring is 2.366 (4) ? and with the other ring is 2.376 (4) ?. The acidic hydrogen of [LuHPc2] could not be located. It is most probably linked to a methine nitrogen and disordered over both rings.
