Alexander M.W. Cargill Thompson

Bio: Alexander M.W. Cargill Thompson is an academic researcher from University of Bristol. The author has contributed to research in topics: Bridging ligand & Coordination complex. The author has an hindex of 7, co-authored 7 publications receiving 408 citations. Previous affiliations of Alexander M.W. Cargill Thompson include University of Florence.

Roles of Bridging Ligand Topology and Conformation in Controlling Exchange Interactions between Paramagnetic Molybdenum Fragments in Dinuclear and Trinuclear Complexes.

Abstract: The magnetic properties of two series of dinuclear complexes, and one trinuclear complex, have been examined as a function of the bridging pathway between the metal centers. The first series of dinuclear complexes is [{MoV(O)(Tp*)Cl}2(μ−OO)], where “OO” is [1,4-O(C6H4)nO]2- (n = 1, 1; n = 2, 3), [4,4‘-O(C6H3-2-Me)2O]2- (4), or [1,3-OC6H4O]2- (2) [Tp* = tris(3,5-dimethylpyrazolyl)hydroborate]. The second series of dinuclear complexes is [{MoI(NO)(Tp*)Cl}2(μ-NN)], where “NN” is 4,4‘-bipyridyl (5), 3,3‘-dimethyl-4,4‘-bipyridine (6), 3,8-phenanthroline (7), or 2,7-diazapyrene (8). The trinuclear complex is [{MoV(O)(Tp*)Cl}3(1,3,5-C6H3O3)] (9), whose crystal structure was determined [9·5CH2Cl2: C56H81B3Cl13Mo3N18O6; monoclinic, P21/n; a = 13.443, b = 41.46(2), c = 14.314(6) A; β = 93.21(3)°; V = 7995(5) A3; Z = 4; R1 = 0.106]. In these complexes, the sign and magnitude of the exchange coupling constant J is clearly related to both the topology and the conformation of the bridging ligand [where J is derived fr...

Effects of Systematic Variation in Bridging Ligand Structure on the Electrochemical and Magnetic Properties of a Series of Dinuclear Molybdenum Complexes

Abstract: Magnetic and electrochemical interactions between two redox-active, paramagnetic {Mo(Tp*)(NO)Cl} fragments [Tp* = tris(3,5-dimethylpyrazolyl)hydroborate] attached to either end of various bis(pyrid...

2,2′:6′,2″-Terpyridines: From chemical obscurity to common supramolecular motifs

Abstract: This tutorial review describes the use of 2,2′:6′,2″-terpyridine (tpy) metal-binding domains in supramolecular chemistry. The origins of tpy chemistry are described and the reasons for its current importance in supramolecular chemistry are explained. Examples of tpy compounds in a wide variety of supramolecular chemistry are presented. The content will be of interest to organic, inorganic, supramolecular and nanoscale chemists.

A Near-Infrared Neutral pH Fluorescent Probe for Monitoring Minor pH Changes: Imaging in Living HepG2 and HL-7702 Cells

Abstract: A near-neutral pH near-infrared (NIR) fluorescent probe utilizing a fluorophore-spacer- receptor molecular framework that can modulate the fluorescence emission intensity through a fast photoinduced electron-transfer process was developed. Our strategy was to choose tricarbocyanine (Cy), a NIR fluorescent dye with high extinction coefficients, as a fluorophore, and 4′-(aminomethylphenyl)-2,2′:6′,2′′-terpyridine (Tpy) as a receptor. The pH titration indicated that Tpy-Cy can monitor the minor physiological pH fluctuations with a pKa of ∼7.10 near physiological pH, which is valuable for intracellular pH researches. The probe responds linearly and rapidly to minor pH fluctuations within the range of 6.70−7.90 and exhibits strong dependence on pH changes. As expected, the real-time imaging of cellular pH and the detection of pH in situ was achieved successfully in living HepG2 and HL-7702 cells by this probe. It is shown that the probe effectively avoids the influence of autofluorescence and native cellular s...

Advances in the field of π-conjugated 2,2':6',2"-terpyridines.

Abstract: This critical review summarizes the research progress made in the field of π-conjugated terpyridines within the last decade. Supramolecular materials based on metal ion complexes of 2,2′:6′,2″-terpyridine derivatives have found manifold potential applications—from opto-electronic devices to life science. In this contribution, synthetic strategies towards π-conjugated terpyridines and their incorporation into advanced supramolecular architectures are evaluated. Applications as photoactive species in, e.g., photovoltaic devices, polymer light-emitting diodes (PLEDSs) and nanotechnology are discussed comprehensively (523 references).

Non-innocent behaviour in mononuclear and polynuclear complexes: consequences for redox and electronic spectroscopic properties

Abstract: This article reviews recent work in the area of non-innocent behaviour in polynuclear metal complexes Non-innocence, which occurs when metal-based and ligand-based redox orbitals are similar in energy, has been known since the first dithiolene complexes of the Ni triad Our recent work in this field is with complexes of two distinct types: polynuclear complexes of Ru(II) with dioxolene-type bridging ligands; and dinuclear complexes based on tris(pyrazolyl)borato-Mo(V) or -Mo(I) units linked by bis-phenolate or bis-pyridyl bridging ligands Detailed redox and UV/Vis/NIR spectroelectrochemical studies on these complexes have been carried out An important point which emerges is that non-innocent behaviour in dinuclear complexes is an essential prerequisite for strong metal–metal electronic coupling across extended bridging ligands Many of the complexes studied show intense charge-transfer transitions in the near-IR region of the spectrum, and the use of these in prototypical optical devices is briefly discussed