Inclusion of Organic Vapors by Crystalline, Solvatochromic [Pt(aryl isonitrile)4][Pd(CN)4] Compounds. "Vapochromic" Environmental Sensors

Square-Planar Pd(II), Pt(II), and Au(III) Terpyridine Complexes: Their Syntheses, Physical Properties, Supramolecular Constructs, and Biomedical Activities

“…36 The treatment of terpyridine ligands (4′-R 1 -tpy; R 1 ) H, phenyl, p-toluoyl) with cis-[Pt(DMSO) 2 (Cl) 2 ] [37][38][39] or trans-[Pt(DMSO) 2 (R 2 )(Cl)] 37,40 (R 2 ) Me, phenyl) in MeOH 37,40 for up to 2 h at 25°C or in CHCl 3 38,39 for 24 h at 25°C afforded the desired [Pt(4′-R 1 -tpy)(Cl)] [Cl] or [Pt(4′-R 1 -tpy)(R 2 )][Cl], respectively, (Scheme 2) in high (64-93%) overall yield. The external Cl -counterion in [Pt(4′-R 1 -tpy)(R 2 )][Cl] was easily exchanged by addition of AgNO 3 , KPF 6 , LiClO 4 or NaB(Ph) 4 (Route C, Scheme 2). 40 However, a terpyridine ligand treated with cis-[Pt(DMSO) 2 (Cl) 2 ] in acetone for 12 h in the dark at 20°C exclusively formed [Pt(tpy)(Cl)][Pt(DMSO)(Cl) 3 ], as a red microcrystalline precipitate, which was recrystallized from DMSO (Route A, Scheme 2).…”

Self‐Assembly of Tubular Microstructures from Mixed‐Valence Metal Complexes and Their Reversible Transformation by External Stimuli

“…Among various types of metal complexes, mixed-valence complexes have attracted much attention because of their wide range of interesting physical and chemical properties from chargetransfer interactions between metal ions linked via bridging ligands. [1][2][3] In particular, low-dimensional assembly of such mixed-valence complexes gives rise to specific electronic, [4a] magnetic, [4b,c] and optical properties.[4d] Moreover, the assembly of discrete binuclear mixed-valence complexes has been suggested as a basis for forming molecular communication system such as quantum cellular automata.[5] Ideally, the characteristics of such systems would be tunable by controlling the spatial arrangement of the mixed-valence complexes, resulting in electric interaction among metal complexes without covalent or coordinative linkage.In this context, supramolecular strategies have been developed to construct nanoassemblies of coordination compounds, such as one-dimensional (1D), [6] two-dimensional (2D), [7] and three-dimensional (3D) metal complexes. [8] However, studies to date have focused on the conversion of crystalline coordination polymers to nanowires, nanosheets, and nanoparticles, which can be regarded as isolation of lowdimensional structures from 3D solids (Scheme 1a).…”

Chromo- and Fluorogenic Organometallic Sensors

“…Thus, the well-known intense colours and vapochromic properties of complexes [Pt(CNR) 4 ][M(CN) 4 ] (M is Pt, Pd; R is alkyl or aryl) are attributed to the presence of extended metal-metal chains of alternating anions and cations [80,81]. The inclusion of vapour guests by the solids gives rise to colour changes (and/or changes in emission) which are mainly related to disruption of the metal-metal interactions, but also to changes in other non-covalent contacts throughout the structure.…”