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A general modular route to fluorophore-linked diphosphines from (4-iodophenyl)P(O)Ph(2) is described. The preparation of chromophoric diphosphine (LHP1) proceeded readily using this route. LHP1 was employed to prepare luminescent metallopolymers of platinum (P1) and palladium (P2) exhibiting modest degrees of polymerization (13-14) and extents of polymerization ( approximately 97%). P1 and P2 appear to be the first metallopolymers polymerized via a visible-absorbing/emitting diphosphine. The photophysical properties of these novel materials are discussed.

Recently reported triple-resonance Y-relayed (1)H,X correlation experiments have been utilized to characterize (183)W and (57)Fe chemical shifts using (119)Sn as the Y-relaying nucleus instead of the previously used (31)P. Application of an adaptation of Gudat's original INEPT/HMQC sequence results in a significant enhancement of the signal-to-noise (S/N) ratio for two-dimensional (119)Sn-relayed (1)H,(183)W and (1)H, (57)Fe correlation spectra with efficient detection of the transition metal nucleus in tungsten and iron complexes lacking an observable direct scalar coupling between the transition metal and any hydrogen nuclei. Strengths and shortcomings of the novel sequence and the original sequences reported by Gudat are discussed in the context of (119)Sn-relayed proton detection of very low frequency transition metal nuclei.