The aim of this proposal is to study the internal dynamics of a novel organometallic polymers based on two metal-containing moieties -Ru, Au- bridged through a tridentate phosphine (PTA). Interestingly, X-ray and light scattering experiments have shown that the polymer self-associates in aqueous solution forming stable micro-particles, which exhibit gel properties, specifically a thermally controlled size transition. Due to their physical and chemical properties, this environment sensitive polymer network is a promising material for industrial and biological applications i.e. smart catalysis, drug delivery or chemical sensing, where a deep knowledge of the structure and dynamics is very important. We are requesting IRIS beamtime to investigate the polymer dynamics associated with the thermally controlled size transition. This proposal is in combination with a structural study on LOQ.