1 article ((M. Blanchard-Desce et al.)) ((running title)) Effect of Branching on Two-Photon Absorption: the Case of Triphenylbenzene Derivatives Dr. Francesca Terenziani, [a][b] Céline Le Droumaguet, [a] Dr. Claudine Katan, [a] Dr. Olivier Mongin, [a] Dr. Mireille Blanchard-Desce* [a] ((Dedicated to )) [a] Synthèse et ElectroSynthèse Organiques (CNRS, UMR 6510), Université de Rennes 1, Institut de Chimie, Campus Scientifique de Beaulieu, Bât 10A, F-35042 Rennes Cedex, France Fax: (+)33 (2) 2323 6277 E-mail: mireille.blanchard-desce@univ-rennes1.fr [b] Dipartimento di Chimica GIAF, Università di Parma, Parco Area delle Scienze 17/A, 43100 Parma, Italy <pict> Supporting information for this article is available on the WWW under http://www.chemphyschem.org or from the author. ((Suggestion for the table-of-contents text)) The two-photon absorption (TPA) cross sections of octupolar branched compounds and corresponding dipolar branches are measured by varying the nature of the end-groups (donor versus acceptors) and the length of the branches. A correlation is found between the fluorescence solvatochromic behavior and the TPA cross section, ascribed to the intramolecular charge-transfer character of the transitions. hal-00516956, version 1 - 15 Sep 2010 Author manuscript, published in "ChemPhysChem 8, 5 (2007) 723-734" DOI : 10.1002/cphc.200600689