S. R. Wu, J. W. Marder, S. Perry, H. B. Kawata, T. Sun et al., Two-Photon Photopolymerization and 3D Lithographic Microfabrication, Nature Nature, vol.398, issue.170, pp.51-54, 1999.

). S. Yao, K. D. Belfieldb-)-s, C. J. Sumalekshmy, and . Fahrni, Two-Photon Fluorescent Probes for Bioimaging, European Journal of Organic Chemistry, vol.8, issue.17, pp.3199-3217, 2011.
DOI : 10.1002/ejoc.201200281

). C. Lafratta, J. T. Fourkas, T. Baldacchini, R. A. Farrerb-)-k, X. Belfield et al., Multiphoton Fabrication, Angewandte Chemie International Edition, vol.124, issue.454, pp.6238-6258, 2000.
DOI : 10.1002/anie.200603995

). J. Fouassier, Photoinitiation, Photopolymerization, and Photocuring; Hanser: Munich, Tsunooka Prog. Polym. Sci, vol.21, pp.1-45, 1995.

S. Katan, M. H. Tretiak, A. J. Werts, R. J. Bain, N. Marsh et al., Two-Photon Transitions in Quadrupolar and Branched Chromophores:?? Experiment and Theory, The Journal of Physical Chemistry B, vol.111, issue.32, pp.9468-9483, 2007.
DOI : 10.1021/jp071069x
URL : https://hal.archives-ouvertes.fr/hal-00516950

M. J. Johnsen, J. Paterson, O. Arnbjerg, C. B. Christiansen, M. Nielsen et al., Effects of conjugation length and resonance enhancement on two-photon absorption in phenylene???vinylene oligomers, Phys. Chem. Chem. Phys., vol.78, issue.8, pp.1177-1191, 2008.
DOI : 10.1039/B715441K

P. Savel, H. Akdas-kilig, J. Malval, A. Spangenberg, T. Roisnel et al., Metal-induced dimensionality tuning in a series of bipyrimidine-based ligands: a tool to enhance two-photon absorption, J. Mater. Chem. C, vol.37, issue.2, pp.295-305, 2014.
DOI : 10.1039/C3TC31370K
URL : https://hal.archives-ouvertes.fr/hal-01091372

S. Chung, M. Rumi, V. Alain, S. Barlow, J. W. Perry et al., Strong, Low-Energy Two-Photon Absorption in Extended Amine-Terminated Cyano-Substituted Phenylenevinylene Oligomers, Journal of the American Chemical Society, vol.127, issue.31, pp.10844-10845, 2003.
DOI : 10.1021/ja052926i

M. Drobizhev, A. Karotki, Y. Dzenis, A. Rebane, Z. Suo et al., Strong Cooperative Enhancement of Two-Photon Absorption in Dendrimers, The Journal of Physical Chemistry B, vol.107, issue.31, pp.7540-7543, 2003.
DOI : 10.1021/jp034986l

G. P. Bartholomew, M. Rumi, S. J. Pond, J. W. Perry, S. Tretiak et al., Two-Photon Absorption in Three-Dimensional Chromophores Based on [2.2]-Paracyclophane, Journal of the American Chemical Society, vol.126, issue.37, pp.11529-11542, 2004.
DOI : 10.1021/ja038743i

). P. Najechalski, Y. Morel, O. Stéphan, and P. L. , Two-photon absorption spectrum of poly(fluorene), Chemical Physics Letters, vol.343, issue.1-2, pp.44-48, 2001.
DOI : 10.1016/S0009-2614(01)00649-2

M. Williams-harry, A. Bhaskar, G. Ramakrishna, T. Goodson, M. Imamura et al., Giant Thienylene-Acetylene-Ethylene Macrocycles with Large Two-Photon Absorption Cross Section and Semishape-Persistence, Journal of the American Chemical Society, vol.130, issue.11, pp.3252-3253, 2008.
DOI : 10.1021/ja078246s

M. Yoon, S. B. Noh, A. Tsuda, Y. Nakamura, A. Osuka et al., ?? Doubly Linked Ni(II) Porphyrin Arrays:?? Large Two-Photon Absorption Cross-Section and Fast Energy Relaxation Dynamics, Journal of the American Chemical Society, vol.129, issue.33, pp.10080-10081, 2007.
DOI : 10.1021/ja0735655

). J. Fréchet, Dendrimers and other dendritic macromolecules: From building blocks to functional assemblies in nanoscience and nanotechnology, Journal of Polymer Science Part A: Polymer Chemistry, vol.9, issue.2, pp.3713-3725, 2003.
DOI : 10.1002/pola.10952

S. Achelle, I. Nouira, B. Pfaffinger, Y. Ramondenc, N. Plé et al., V-Shaped 4,6-Bis(arylvinyl)pyrimidine Oligomers: Synthesis and Optical Properties, The Journal of Organic Chemistry, vol.74, issue.10, pp.3711-3717, 2009.
DOI : 10.1021/jo900107u

S. Hadad, J. C. Achelle, J. García-martínez, ). A. Rodríguez-lópezb, S. Aranda et al., 4-Arylvinyl-2,6-di(pyridin-2-yl)pyrimidines: Synthesis and Optical Properties, The Journal of Organic Chemistry, vol.76, issue.10, pp.3837-3845, 2011.
DOI : 10.1021/jo200204u
URL : https://hal.archives-ouvertes.fr/hal-00875496

A. S. Davidov, Theory of molecular excitons, 1971.

A. Aratani, Y. H. Osuka, D. H. Kim, D. Jeong, and . Kim, Extremely Long, Discrete meso?????????meso-Coupled Porphyrin Arrays, Angewandte Chemie International Edition, vol.39, issue.8, pp.1458-1462, 2000.
DOI : 10.1002/(SICI)1521-3773(20000417)39:8<1458::AID-ANIE1458>3.0.CO;2-E

). Yang, S. Chiou, and K. Liau, -Phenyl Substitutions:?? The ???Amino Conjugation Effect???, Journal of the American Chemical Society, vol.124, issue.11, pp.2518-2527, 1039.
DOI : 10.1021/ja016416+
URL : https://hal.archives-ouvertes.fr/hal-01258459

J. R. Platt, Classification of Spectra of Cata???Condensed Hydrocarbons, The Journal of Chemical Physics, vol.17, issue.5, pp.484-487, 1949.
DOI : 10.1063/1.1747293

R. P. Subrayan, J. W. Kampf, and P. G. Rasmussen, Synthesis and Properties of Bis- and Tris(4,5-dicyano-1-methyl-2-imidazolyl)amines: A New Acidic Secondary Amine and a Nonbasic Tertiary Amine, The Journal of Organic Chemistry, vol.59, issue.15, pp.4341-4345, 1994.
DOI : 10.1021/jo00094a060

C. Xu and W. W. Webb, Measurement of two-photon excitation cross sections of molecular fluorophores with data from 690 to 1050 nm, Journal of the Optical Society of America B, vol.13, issue.3, pp.481-491, 1996.
DOI : 10.1364/JOSAB.13.000481

K. Nakao, M. Nishimura, T. Tamachi, Y. Kuwatani, H. Miyasaka et al., Giant Macrocycles Composed of Thiophene, Acetylene, and Ethylene Building Blocks, Journal of the American Chemical Society, vol.128, issue.51, pp.16740-16747, 2006.
DOI : 10.1021/ja067077t

Y. Miyasaka, Y. Satoh, S. Ishibashi, Y. Ito, S. Nagasawa et al., Ultrafast Photodissociation Dynamics of a Hexaarylbiimidazole Derivative with Pyrenyl Groups: Dispersive Reaction from Femtosecond to 10 ns Time Regions, Journal of the American Chemical Society, vol.131, issue.21, pp.7256-7263, 1992.
DOI : 10.1021/ja809195s

M. Kawano, T. Sano, J. Abe, Y. Ohashi, and J. Am, The First in Situ Direct Observation of the Light-Induced Radical Pair from a Hexaarylbiimidazolyl Derivative by X-ray Crystallography, Journal of the American Chemical Society, vol.121, issue.35, pp.8106-8107, 1995.
DOI : 10.1021/ja9903173

). D. Eaton, A. Gafney-horgan, J. P. Horgan, J. S. Suzuki, T. Urano et al., Mechanism of coinitiation of photopolymerization of methyl methacrylate by hexaarylbiimidazole???hydrogen-atom donor combinations. The role of electron transfer vs. direct hydrogen-atom abstraction, Miyagawa, S. Takahara and T. Yamaoka J. Photopolym. Sci. Tech, pp.373-391, 1991.
DOI : 10.1016/1010-6030(91)87056-2

H. Fischer and L. R. Angew, Factors Controlling the Addition of Carbon-Centered Radicals to Alkenes???An Experimental and Theoretical Perspective, Angewandte Chemie International Edition, vol.13, issue.462, pp.1340-1371, 2001.
DOI : 10.1002/1521-3773(20010417)40:8<1340::AID-ANIE1340>3.0.CO;2-#

T. J. Prazeres, A. Fedorov, S. P. Barbosa, J. M. Martinho, and M. N. Berberan-santos, Accurate Determination of the Limiting Anisotropy of Rhodamine 101. Implications for Its Use as a Fluorescence Polarization Standard, The Journal of Physical Chemistry A, vol.112, issue.23, pp.5034-5039, 2008.
DOI : 10.1021/jp710625j

D. V. Connor and D. , Phillips Time correlated single photon counting, 1984.

M. A. Albota, C. Xu, and W. W. Webb, Two-photon fluorescence excitation cross sections of biomolecular probes from 690 to 960 nm, Applied Optics, vol.37, issue.31, pp.7352-7356, 1998.
DOI : 10.1364/AO.37.007352

S. Aloïse, Z. Pawlowska, C. Ruckebusch, M. Sliwa, J. Dubois et al., A two-step ICT process for solvatochromic betaine pyridinium revealed by ultrafast spectroscopy, multivariate curve resolution, and TDDFT calculations, Physical Chemistry Chemical Physics, vol.99, issue.6, pp.1945-1956, 2012.
DOI : 10.1039/c2cp22254j