Journal
ORGANIC LETTERS
Volume 4, Issue 9, Pages 1495-1498Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol025703v
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[GRAPHIC] The synthesis and nonlinear optical characterization of two novel heteroaromatic-based chromophores is described. The new dyes present an A-pi-D-pi-A general framework, where A is a T-deficient heteroaromatic ring (pyridine, quinoline, benzothiazole) and D a T-excessive pyrrolyl moiety. Both systems exhibit large two-photon absorption (TPA) values in the femtoseconds regime (TPA cross section as high as 150 x 10(-50) cm(4) s photon(-1) molecule(-1) with 150 fs laser pulses). Their TPA-based optical limiting activity is also shown.
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