Showing papers by "M. Teresa Moreno published in 2016"
TL;DR: A plausible mechanism of the mechanochromic processes is proposed, involving reversible crystalline-to-amorphous phase transitions, and two different forms, 2-o (orange) and 2-y (yellow), exhibiting different colors and emissions were found depending on the isolation conditions.
Abstract: Platinum solvate complexes [Pt(C6F5)(C^N)(S)] [C^N = phenylpyridinyl (ppy), S = dimethyl sulfoxide (DMSO) (A); C^N = benzoquinolinyl (bzq), S = CH3COCH3 (B)] react with [Tl(Spy)] (Spy = 2-pyridinethiolate) to afford binuclear [{Pt(C6F5)(C^N)}Tl(Spy)] [C^N = ppy (1) and bzq (2)] species containing a Pt–Tl bonding interaction, supported by a μ-Spy-κN,S bridging ligand, as confirmed by X-ray diffraction. However, the related reactions with [Tl(SpyCF3-5)] [SpyCF3-5 = 5-(trifluoromethyl)-2-pyridinethiolate] give neutral extended chains [{Pt(C6F5)(C^N)}Tl(SpyCF3-5)]n [C^N = ppy (3) and bzq (4)]. 3 features a zigzag −Pt–Tl···S–Pt– chain, generated by Pt–Tl and Tl···S bonds, with the SpyCF3 acting as a μ-κN:κ2S bridging ligand, whereas 4 displays an unsupported ···Tl–Pt···Tl–Pt··· backbone (angle of ca. 158.7°). The lowest-energy absorption bands in the UV–vis spectra in CH2Cl2, associated with 1L′LCT transitions with minor 1LC/1MLCT (L′ = Spy or SpyCF3-5; L = C^N) character, are similar for all complexes 1–4, de...
31 citations
TL;DR: In this article, the tetranuclear neutral Pt2Pb2 derivatives are stabilized by PbII···η2-(C≡CR) bonding interactions in the solid state, as confirmed by X-ray crystallography.
17 citations
TL;DR: Two unprecedent alkynyl bridging cyclometalated clusters where M is Ag (2) and Cu (3), which display distinctive luminescence properties are reported.
Abstract: We report two unprecedent alkynyl bridging cyclometalated clusters [Ir2M2(ppy)4(μ-CCC6H4-OMe3)4] where M is Ag (2) and Cu (3), which display distinctive luminescence properties. While 2 features a green phosphorescence/electroluminescence nature located at the ppy ligands (3LC), 3 shows an orange emission confined to the metals and alkynyl groups having a mixed 3L′C/3L′MCT/3MMCT (L′ = alkynyl) nature.
10 citations