Design, self-assembly, and photophysical properties of pentameric metallomacrocycles: [M5(N-hexyl[1,2-bis(2,2′:6′,2″-terpyridin-4-yl)]carbazole)5][M = Fe(ii), Ru(ii), and Zn(ii)]

Abstract

A novel family of metallopentacycles was constructed by the facile self-assembly of a bis(terpyridine)-carbazole monomer utilizing terpyridine-metal(II)-terpyridine connectivity; its photophysical properties were investigated.

Optical Response of Terpyridine Ligands to Zinc Binding: A Close Look at the Substitution Effect by Spectroscopic Studies at Low Temperature

“…The formation of a (tpy) 2 Zn 2+ complex with a 2:1 ligand-to-metal ratio is common as it is even useful for the formation of macrocyclic rings. 10 The formation of (tpy) 2 Zn 2+ complex was further verified by mass spectroscopy study of “ 1a + ZnCl 2 ” solution in ethanol, which detected the major peak at m/z 803 that matched the isotope distribution for [C 46 H 40 ClN 8 Zn] + (=[( 1a ) 2 ZnCl] + ion) (Figure 2). Interestingly, further addition of Zn 2+ (from 0.5 to 1.0 equiv) gradually shifted the absorption peak to a shorter wavelength (λ max = 418 nm; Figure 1a).…”

Supramolecular Coordination: Self-Assembly of Finite Two- and Three-Dimensional Ensembles

“…The same group also reported a novel family of metallocyclic pentagons constructed by the facile self-assembly of a bis(terpyridine)-carbazole ( 104 ) utilizing terpyridine-metal coordination as the driving force for the assembly process. 149 The treatment of 104 with one equivalent of M 2+ ion [M = Fe ( 105 ), Ru, Zn] in MeOH allowed for the formation of pentameric cationic macrocycles (Scheme 31). Multinuclear NMR, UV-vis and mass spectrometric established the structures of these pentagonal architectures.…”

5,10,15,20-Tetrakis[4′-(terpyridinyl)phenyl]porphyrin and its Ruii complexes: Synthesis, photovoltaic properties, and self-assembled morphology

“…10 Action spectra obtained for Zn II -porphyrins showed significant photocurrents at ca. 450-600 nm (Fig.…”