Synthesis of dual NIR two-photon absorptive [60]fullerenyl multiadducts for nonlinear light-transmittance reduction application

Seaho Jeon; Min Wang; Taizoon Canteenwala; Loon-Seng Tan; Wei Ji; Thomas Cooper; Long Chiang

doi:10.1117/12.2060935

7 October 2014 Synthesis of dual NIR two-photon absorptive [60]fullerenyl multiadducts for nonlinear light-transmittance reduction application

Seaho Jeon, Min Wang, Taizoon Canteenwala, Loon-Seng Tan, Wei Ji, Thomas Cooper, Long Chiang

Author Affiliations +

Proceedings Volume 9181, Light Manipulating Organic Materials and Devices; 918105 (2014) https://doi.org/10.1117/12.2060935
Event: SPIE Organic Photonics + Electronics, 2014, San Diego, California, United States

Abstract

Synthesis of several C₆₀-(antenna)_x conjugates was performed to demonstrate high flexibility in the design of organic nonlinear optical (NLO) nanostructures showing broadband characteristics with capability to absorb light over a wide range of wavelengths. It was achieved by covalent attachment of a hybrid combination of two types of light-harvesting fluorescent antenna chromophores on a C₆₀ cage. Ultrafast photoresponsive intramolecular Föster resonance energy-transfer among antenna units and shared excited energy-accepting C₆₀ cage is proposed as a plausible mechanism to enhance the broadband NLO ability. Characterization of the branched triad C₆₀(>DPAF-C₁₈)(>CPAF-C_2M) and the tetrad C₆₀(>DPAF-C₁₈)(>CPAF-C_2M)₂ was carried out by various spectroscopic techniques. These compounds showed approximately equal extinction coefficients of optical absorption over 400‒550 nm that corresponds to near-IR two-photon based excitation wavelengths at 780‒1100 nm. These nanomaterials may be utilized in NLO coatings for achieving efficient light-transmittance reduction at the same NIR wavelengths.

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Seaho Jeon, Min Wang, Taizoon Canteenwala, Loon-Seng Tan, Wei Ji, Thomas Cooper, and Long Chiang "Synthesis of dual NIR two-photon absorptive [60]fullerenyl multiadducts for nonlinear light-transmittance reduction application", Proc. SPIE 9181, Light Manipulating Organic Materials and Devices, 918105 (7 October 2014); https://doi.org/10.1117/12.2060935

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