478184-38-2Relevant academic research and scientific papers
Synthesis, spectroscopy, photophysics of multi-chromophoric ZN(II) group 8 metal complexes
-
Page/Page column 25, (2008/12/04)
Novel multichromophoric complexes comprising the formula[in-line-formulae]R1—RA-[MC]-([RM]z-[MC])m-RA—R2[/in-line-formulae]are provided. Polymeric compositions and devices comprising the same are also discussed. The complexes are characterized by a central bridging moiety comprising one or a plurality of linked conjugated macrocyclic molecules [MC] coupled to at least one inorganic moiety (R1 and/or R2) through organic linker RA. Preparation methods include metal-mediated cross-coupling techniques. The complexes can be useful in nonlinear optical devices and other optoelectronic applications.
Unusual frequency dispersion effects of the nonlinear optical response in highly conjugated (polypyridyl)metal-(porphinato)zinc(II) chromophores
Uyeda, H. Tetsuo,Zhao, Yuxia,Wostyn, Kurt,Asselberghs, Inge,Clays, Koen,Persoons, Andre,Therien, Michael J.
, p. 13806 - 13813 (2007/10/03)
The syntheses and electrooptic properties of a new family of nonlinear optical chromophores are reported. These species feature an ethyne-elaborated, highly polarizable porphyrinic component and metal polypyridyl complexes that serve as integral donor and acceptor elements. Examples of this structural motif include ruthenium(II) [5-(4′-ethynyl-(2,2′;6′, 2″-terpyridinyl))-10,20-bis(2′,6′-bis(3, 3-dimethyl-1-butyloxy)phenyl)porphinato]zinc(II)- (2,2′;6′,2″-terpyridine)2+ bis-hexafluorophosphate (Ru-PZn); osmium(II) [5-(4′-ethynyl-(2,2′;6′, 2″-terpyridinyl))-10,20-bis(2′,6′-bis(3, 3-dimethyl-1-butyloxy)phenyl)porphinato]zinc(II)-(2, 2′;6′,2″-terpyridine)2+ bis-hexafluorophosphate (Os-PZn); ruthenium(II) [5-(4′-ethynyl-(2,2′;6′, 2″-terpyridinyl))-15-(4′-nitrophenyl)ethynyl-10, 20-bis(2′,6′-bis(3,3-dimethyl-1-butyloxy) phenyl)porphinato]zinc(II)-(2,2′;6′, 2″-terpyridine)2+ bis-hexafluorophosphate (Ru-PZn-A); osmium(II) [5-(4′-ethynyl- (2,2′;6′,2″-terpyridinyl))-15- (4′-nitrophenyl)ethynyl-10,20-bis(2′, 6′-bis(3,3-dimethyl-1-butyloxy)phenyl) porphinato]zinc(II)-(2,2′;6′,2″-terpyridine)2+ bis-hexafluorophosphate (Os-PZn-A); and ruthenium(II) [5-(4′-ethynyl- (2,2′;6′,2″-terpyridinyl))osmium(II) -15-(4′-ethynyl-(2,2′;6′,2″-terpyridinyl))-10,20-bis (2′,6′-bis(3,3-dimethyl-1-butyloxy)phenyl) porphinato]zinc(Il)-bis(2,2′;6′, 2″-terpyridine)4+ tetrakis-hexafluorophosphate (Ru-PZn-Os). The frequency dependence of the dynamic hyperpolarizability of these compounds was determined from hyperRayleigh light scattering (HRS) measurements carried out at fundamental incident irradiation wavelengths (λinc) of 800, 1064, and 1300 nm. These data show that (i) coupled oscillator photophysics and metal-mediated cross-coupling can be exploited to elaborate high β0 supermolecules that exhibit significant excited-state electronic communication between their respective pigment building blocks; (ii) high-stability metal polypyridyl compounds constitute an attractive alternative to electron releasing dialkyl- and diarylamino groups, the most commonly used donor moieties in a wide range of established nonlinear optical dyes; (iii) this design strategy enables ready elaboration of chromophores having extraordinarily large dynamic hyperpolarizabilities (βλ values) at telecommunication relevant wavelengths; and (iv) porphyrin B- and Q-state-derived static hyperpolarizabilities (β0 values) can be designed to have the same or opposite sign in these species, thus providing a new means to regulate the magnitude of λinc-specific dynamic hyperpolarizabilities.
