Metallooxacyclobutane complexes, Pt[C2(CN)40]L2 (L = P(C6H5)3, P(p-CH3C6H4)3, As(C6H5)3), were prepared from the reaction between tetracyanooxirane (2,2,3,3-tetracyanooxacyclopropane, C2(CN)40) and PtL4. The crystal and molecular structure of the complex where L = As(C6H5)3 has been determined from three-dimensional X-ray diffraction data. The crystal has symmetry consistent with the space group Ph/c [CV] with four molecules of the complex in a unit cell of dimensions a = 9.933 (2) A, b = 20.477 (3) A, c = 18.634 (3) A, and ß - 95.42 (1)°. The structure was refined by least-squares techniques to a conventional R index of 0.039 based on 4819 reflections above background collected using a four-circle diffractometer. The structure determination shows that Pt[As(C6H5)3]2 has inserted into the carbon-oxygen bond of the oxirane. Such a metallooxacyclobutane ring has recently been suggested as an intermediate in the catalytic formation of ethylene carbonate from Ni°c omplexes, ethylene oxide, and C02. Comparisons are made between the structural parameters of the present complex, the closely related metallocyclobutane complex Pt[C2(CN)4CH2][P(C6Hs)3]2, and the small rings tetracyanooxirane and 1,1,2,2-tetracyanocyclopropane. Spectroscopic data and chemical behavior of the metallooxacyclobutane complexes are reported.

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Optofluidics is increasingly gaining impact in a number of different fields of research, namely biology and medicine, environmental monitoring and green energy. However, the market for optofluidic products is still in the early development phase. In this manuscript, we discuss modular platforms as a potential concept to facilitate the transfer of optofluidic sensing systems to an industrial implementation. We present microfluidic and optical networks as a basis for the interconnection of optofluidic sensor modules. Finally, we show the potential for entire optofluidic networks.

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