The ultrafast energy transfer process in naphtole–nitrobenzofurazan bichromophoric molecular systems

Pyrene‐Excimers‐Based Antenna Systems

“…[11] Commercially available as a chloride salt, 14 becomes fluorescent after conjugation with an amino group. Styrylpyridinium derivatives, such as 15, which are readily available from the alkylation of the pyridine nitrogen atom of N,N-diethyl-N-[4-{(E)-2-(4-pyridinyl)ethenyl}phe-nyl]amine (19), [20,21] are versatile fluorophores that are wellknown red emitters used mainly as fluorescent probes.…”

“…This possibility was rather used as a probe to study the structural characteristics of dendrimers than for the production of devices. [7,8,9] As a result of our ongoing research into the synthesis of light-harvesting antennae, [10,11] we were interested in the synthesis of new dendrimers with their outer parts decorated with pyrene units to build up light-harvesting systems based on the excimeric fluorescence of pyrene, thus profiting from the supramolecular process (i.e., the excimer formation) within a molecular assembly. Such an approach has, to the best of our knowledge, only one precedent concerning the quenching of the pyrene excimers through a FRET process.…”

Excitation Dynamics in Hetero‐bichromophoric Calixarene Systems

“…The lifetimeo ft he acceptori nt he bichromophoricc ompounds is only weakly modified with respect to the reference acceptor compound Au in DMSO,w hereasasizabled ecrease is observed in CHCl 3 and MeCN. Moreover,ab iexponential decay of the emission of the acceptor is observed for DuAu in CHCl 3 and MeCN, that is, under the conditions of maximized interchromophore interactions.…”

“…[1][2][3][4][5][6][7][8][9][10] Besides important applications in the field of solar energy conversiona nd storage, the development of artificial photosynthetic systems also has as trong impact on the production of various optoelectronic devices and solar concentrators. [11] Natural photosynthetic units are complex and well-organized structures,c onstituted by denselyp acked assemblies of chromophores, mainly chlorophyllsa nd carotenoids,e mbedded in ap rotein matrix.…”

Cu2+ chemosensing behaviour of self-organized micro-array structures of a donor–acceptor bichromophoric compound anchored onto Ag nanoisland films

“…DABS consists of two naphthalene (in the form of 2-(1-chloronaphthalen-4-yloxy)acetic acid) and one benzofurazan groups connected by one diethanolamino moiety. Its spectroscopic properties and the FRET process that takes place upon irradiation around 300 nm between the D naphthalene group and the A benzofurazan group were studied in details either in solution [13] or in the solid state [14]. Here, we will show how DABS chemisorption onto Ag nanoisland films (AgNIFs) can lead to formation of fluorescent microplatforms, whose emission is strongly quenched in the presence of Cu 2+ .…”