Light-Harvesting Ytterbium(III)-Porphyrinate-BODIPY Conjugates: Synthesis, Excitation-Energy Transfer, and Two-Photon-Induced Near-Infrared-Emission Studies

2012 ◽  
Vol 19 (2) ◽  
pp. 739-748 ◽  
Author(s):  
Tao Zhang ◽  
Xunjin Zhu ◽  
Wai-Kwok Wong ◽  
Hoi-Lam Tam ◽  
Wai-Yeung Wong
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Near Infrared ◽  
Light Harvesting ◽  
Excitation Energy Transfer ◽  
Infrared Emission ◽  
Two Photon ◽  
Emission Studies ◽  
Near Infrared Emission

Organogels as scaffolds for excitation energy transfer and light harvesting

2008 ◽  
Vol 37 (1) ◽  
pp. 109-122 ◽  
Author(s):  
Ayyappanpillai Ajayaghosh ◽  
Vakayil K. Praveen ◽  
Chakkooth Vijayakumar
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Light Harvesting ◽  
Excitation Energy Transfer

scholarly journals Two-photon excited deep-red and near-infrared emissive organic co-crystals

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yu Wang ◽  
Huang Wu ◽  
Penghao Li ◽  
Su Chen ◽  
Leighton O. Jones ◽  
...  
Keyword(s):  
Cross Sections ◽  
Optical Materials ◽  
Near Infrared ◽  
Infrared Emission ◽  
Photon Absorption ◽  
Electromagnetic Spectrum ◽  
Absorption Bands ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Near Infrared Emission

Abstract Two-photon excited near-infrared fluorescence materials have garnered considerable attention because of their superior optical penetration, higher spatial resolution, and lower optical scattering compared with other optical materials. Herein, a convenient and efficient supramolecular approach is used to synthesize a two-photon excited near-infrared emissive co-crystalline material. A naphthalenediimide-based triangular macrocycle and coronene form selectively two co-crystals. The triangle-shaped co-crystal emits deep-red fluorescence, while the quadrangle-shaped co-crystal displays deep-red and near-infrared emission centered on 668 nm, which represents a 162 nm red-shift compared with its precursors. Benefiting from intermolecular charge transfer interactions, the two co-crystals possess higher calculated two-photon absorption cross-sections than those of their individual constituents. Their two-photon absorption bands reach into the NIR-II region of the electromagnetic spectrum. The quadrangle-shaped co-crystal constitutes a unique material that exhibits two-photon absorption and near-infrared emission simultaneously. This co-crystallization strategy holds considerable promise for the future design and synthesis of more advanced optical materials.

How the Molecular Environment Controls Excitation Energy Transfer and Light Harvesting: a Quantum Mechanical Model

2007 ◽  
Author(s):  
Benedetta Mennucci ◽  
Carles Curutchet ◽  
Roberto Cammi ◽  
Gregory D. Scholes ◽  
Theodore E. Simos ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Mechanical Model ◽  
Light Harvesting ◽  
Excitation Energy Transfer ◽  
Quantum Mechanical ◽  
Quantum Mechanical Model
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