A series of homoleptic bis(phthalocyaninato) rare earth sandwich complexes with large two-photon absorption cross-section. (November 2015)

• Record Type: Journal Article
• Authors: Sheng, Ning; Liu, Dahui; Gu, Bing; He, Jun; Cui, Yiping
• Is Part Of: Dyes and pigments. Volume 122(2015)
• Page Start: 346
• Page End: 350
• Publication Date: 2015-11
• Subjects: Phthalocyanine -- Sandwich type -- Two-photon absorption -- Rare earth -- π–π interaction -- Femtosecond-pulsed Z-scan technique; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2015.07.011
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: The third-order nonlinear optical properties of a series of homoleptic substituted phthalocyaninato rare earth double-decker complexes were experimentally investigated by the Z -scan technique at the wavelength of 800 nm. All complexes were revealed to exhibit large two-photon absorption cross-sections. The measured two-photon absorption values of these complexes remain constant at different laser intensities, indicating nonlinearity is originated from pure two-photon absorption behavior. In addition, the two-photon absorption cross-section of these complexes increases along with the decrease of the rare earth atomic radius, suggesting that intense intramolecular π–π interaction between the phthalocyaninato macrocycles improves the third-order nonlinear optical properties. The optical limiting behavior of these complexes in chloroform was also investigated by using femtosecond laser pulses. The excellent two-photon absorption properties and optical limiting performance indicate their good application potential in photonic and optoelectronic devices. Highlights: The 2PA properties of a series of sandwich type complexes were investigated. All complexes exhibit large 2PA cross-sections. The unique π–π interaction in these complexes is effective to improve their 2PA properties.