Synthesis and optical characterisation of platinum(II) poly-yne polymers incorporating substituted 1,4-diethynylbenzene derivatives and an investigation of the intermolecular inter... od Khan, MS, Al-Mandhary, M, Al-Suti, M, Corcoran, T, Al-Mahrooqi, Y, Attfield, J, Feeder, N, David, W, Shankland, K, Friend, R, Kohler, A, Marseglia, E, Tedesco, E, Tang, C, Raithby, P, Collings, J, Roscoe, K, Batsanov, A, Stimson, L, Marder, T