Convergent synthesis of a heptaruthenium metallostar

Stars and stripes: hexatopic tris(3,2′:6′,3′′-terpyridine) ligands that unexpectedly form one-dimensional coordination polymers

“…molecular polyhedra). 41 Some 20 years ago, we introduced the term metallostar to describe such polynuclear assemblies [42][43][44][45][46] and the concept of using tritopic tris(2,2′:6′,2″-tpy) ligands (Scheme 3) for the growth of 2D or 3D CPs was developed by us and others, 47,48 and the potential in materials chemistry subsequently demonstrated. [49][50][51][52][53][54][55][56][57][58] The groups of Nishihara, 56,57 Wong 54 and Chakraborty 51,55 showed a series of coordination nanosheets using different tris(terpyridines) in which durable electrochromism was observed with Fe 2+ or Co 2+ .…”

A Carboxylate-Rich Metalloligand and Its Heterometallic Coordination Polymers: Syntheses, Structures, Topologies, and Heterogeneous Catalysis

“…Crystalline coordination polymers constitute an important class of materials due to their interesting architectures − and significant structure-based applications in sorption, , sepration, , sensing, − ion-exchange and transport, , proton conduction, − optics, − magnetic materials, , devices, , and catalysis. − In particular, their utilization as the heterogeneous catalysts in assorted organic transformation reactions has often resulted due to their crystalline nature and therefore orderly arrangement of the catalytic centers and their unique ability to support the facile diffusion of substrates and reagents, a feature reminiscent of zeolites. − While the literature presents numerous homometallic coordination polymers, heterometallic coordination polymers incorporating two different metals are comparatively fewer. − Such a stark difference between two categories is due to the synthetic difficulty in placing two different metals in close proximity. Although judiciously selected ligands, offering two different coordination environments suitable to satisfy the geometrical and/or electronic requirement of two different metals, have been successfully used for the construction of heterometallic coordination polymers (HCPs), − such examples are limited due to cumbersome syntheses. ,, In this context, a well-defined metalloligand, already having a primary metal ion but offering additional coordination-sensitive functional groups to potentially ligate a secondary metal i...…”

Evaluation of polynuclear dendrons as photosensitizers for dye-sensitized solar cells

“…The presence of the 4 0 -chloro substituent in [Ru(tpy)(4 0 -Cltpy)] 2+ activates the 4 0 -carbon site towards attack by nucleophiles, [27][28][29] and we have capitalized upon this behaviour for the divergent synthesis of a range of multinuclear systems. 12,[30][31][32][33][34][35][36] The reaction of [Ru(4)( 5 The conversion of the ester functionality to carboxylic acid was achieved by treatment with aqueous NaOH at 80 C for 24 h. With the exception of the disappearance of the signals for the methyl group, the 1 H and 13 C NMR spectra of [( 2)Ru(m-1){Ru(tpy)} 2 ] 6+ are essentially identical to those of [( 4)Ru(m-1){Ru(tpy)} 2 ] 6+ . The highest mass peak at m/z 1254.0 in the electrospray mass spectrum was consistent with [M À 2PF 6 ] 2+ , and the isotope distribution matched that calculated for the trinuclear complex.…”