Accumulation of the photonic energy of the deep-red part of the terrestrial sun irradiation by rare-earth metal-free <i>E</i>–<i>Z</i> photoisomerization
Here, drastic shortening of the syntheticroute of crown ether functionalized hemicyanine dyes, suitable for efficient E–Z photoisomerization under extremely low excitation light intensities compared with unconcentrated sunlight is reported. The higher energetic form was successfully stabilized by rare earth free cations – in this case by styryl dye-Ba2+ complexes. For the first time E–Z photoisomerization
Chemically reactive carbocyanine dyes incorporating an indolium ring moiety that is substituted at the 3-position by a reactive group or by a conjugated substance, and their uses, are described. Conjugation through this position results in spectral properties that are uniformly superior to those of conjugates of spectrally similar dyes wherein attachment is at a different position. The invention includes derivative compounds having one or more benzo nitrogens.
[EN] PROCESS FOR DYE PRODUCTION<br/>[FR] PROCÉDÉ POUR LA PRODUCTION DE COLORANT
申请人:UNIV CENTRAL LANCASHIRE
公开号:WO2013114115A1
公开(公告)日:2013-08-08
The present invention relates to a process for the production of certain compounds, especially dye compounds defined in general by Formula I: The invention provides a one-step method in which a compound of Formula II or a reactive intermediate derived in situ therefrom is reacted in situ with a compound of Formula III (optionally in the presence of a compound of Formula IV) to produce compounds of Formula I in excellent yield, and in a manner which avoids undesirable by- product formation.
Precious metal-free molecular machines for solar thermal energy storage
作者:Meglena I Kandinska、Snejana M Kitova、Vladimira S Videva、Stanimir S Stoyanov、Stanislava B Yordanova、Stanislav B Baluschev、Silvia E Angelova、Aleksey A Vasilev
DOI:10.3762/bjoc.15.106
日期:——
and elemental analysis. The steady-state photophysical properties of the dyes were elucidated. The stability constants of metal complexes were determined and are in good agreement with the literature data for reference dyes. The temporal evolution of trans-to-cis isomerization was observed in a real-time regime. The dyes demonstrated a low intrinsic fluorescence of their Ba2+ complexes and high yield