Synthesis and Two‐Photon Absorption Property Characterizations of Small Dendritic Chromophores Containing Functionalized Quinoxaliniod Heterocycles. Issue 2 (21st November 2012)

• Record Type: Journal Article
• Authors: Lin, Tzu‐Chau; Lee, Ying‐Hsuan; Liu, Che‐Yu; Huang, Bor‐Rong; Tsai, Ming‐Yu; Huang, Yu‐Jhen; Lin, Ja‐Hon; Shen, Yu‐Kai; Wu, Cheng‐Yu
• Is Part Of: Chemistry. Volume 19:Issue 2(2013)
• Page Start: 749
• Page End: 760
• Publication Date: 2012-11-21
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201202178
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A series of star‐shaped multi‐polar chromophores (compounds <bold>1</bold>–<bold>3</bold>) containing functionalized quinoxaline and quinoxalinoid (indenoquinoxaline and pyridopyrazine) units has been synthesized and characterized for their two‐photon absorption (2PA) properties both in the femtosecond and the nanosecond time domain. Under our experimental conditions, these model fluorophores are found to manifest strong and wide‐dispersed two‐photon absorption in the near‐infrared region. It is demonstrated that molecular structures with multi‐branched π frameworks incorporating properly functionalized quinoxalinoid units would possess large molecular nonlinear absorptivities within the studied spectral range. Effective optical‐power attenuation and stabilization behaviors in the nanosecond time domain of a selected representative dye molecule (i.e., compound <bold>2</bold>) from this model compound set were also investigated and the results indicate that such structural motif could be a useful approach for the molecular design toward strong two‐photon‐absorbing material systems for quick‐responsive and broadband optical‐suppressing‐related applications, particularly to confront long laser pulses.</p> </abstract>