26198-05-0Relevant articles and documents
An improved efficiency/transparency trade-off for second-harmonic generation by extending the π-electron bridge of an optically nonlinear dye
Ashwell, Geoffrey J.,Whittam, Anne J.,Amiri, Mukhtar A.,Hamilton, Richard,Green, Andrew,Grummt, Ulrich-Walter
, p. 1345 - 1350 (2001)
The second-harmonic intensity from Langmuir-Blodgett films of 5-{4-[2-(4-dimethylaminophenyl)vinyl]benzylidene}-2-octadecyl-5,6,7,8- tetrahydroisoquinolinium octadecyl sulfate(1), interleaved with poly(tert-butyl methacrylate), increases quadratically with thickness to more than 100 bilayers. The susceptibility, molecular hyperpolarisability, thickness, refractive indices and chromophore tilt angle, relative to the substrate normal, are Xzzz(2)=45 ± 5 pm V-1 at 1064 nm, β = 8 × 10-38 m4 V-1, l=3.65 ± 0.12 nm bilayer -1, nω = 1.56 ± 0.01 and ψ = 44 ± 2 °. The moderately high susceptibility arises from an optimised transparency/efficiency trade-off, the alternate-layer LB film being transparent at 1064 nm and having a very slight absorbance of 3.5 × 10-4 bilayer -1 at 532 nm. In contrast, alternate-layer films of the correseponding 7-diethylamino-2-oxo-2H-chromen-3-ylmethylene (2) and 3-(dimethylaminophenyl)prop-2-enylidene (3) derivatives, also reported, have absorbances of 1.1 × 10-3 and 1.5 × 10-3 bilayer-1 at 532 nm and resonantly enhanced susceptibilities of 60 and 95 pm V-1 respectively.
Fluorine-induced J-aggregation enhances emissive properties of a new NLO push-pull chromophore
Botta, Chiara,Cariati, Elena,Cavallo, Gabriella,Dichiarante, Valentina,Forni, Alessandra,Metrangolo, Pierangelo,Pilati, Tullio,Resnati, Giuseppe,Righetto, Stefania,Terraneo, Giancarlo,Tordin, Elisa
supporting information, p. 5275 - 5279 (2014/07/07)
A new fluorinated push-pull chromophore with good second-order NLO properties even in concentrated solution shows solid state intermolecular aryl-fluoroaryl interactions leading to J-aggregates with intense solid state luminescence. This journal is the Pa
Rational design of amyloid binding agents based on the molecular rotor motif
Sutharsan, Jeyanthy,Dakanali, Marianna,Capule, Christina C.,Haidekker, Mark A.,Yang, Jerry,Theodorakis, Emmanuel A.
scheme or table, p. 56 - 60 (2010/11/02)
New fluorescent probes, designed based on the molecular rotor motif, displayed good affinity for aggregated b-amyloid peptides. The physical and fluorescence properties of these probes can be fine tuned by modifying their chemical structures. These findin
