Synthesis of star-shaped monodisperse oligo(9,9-di-n-octylfluorene-2,7-vinylene)s functionalized truxenes with two-photon absorption properties.
A series of new star-shaped monodisperse conjugated truxene derivatives bearing oligo(fluorene-vinylene) arms (Tr-OFVn, n = 1, 2, 3, 4) have been synthesized. It is found that the conjugation of the oligomers can be extended with prolonging the arms. Notably, the branched oligomers Tr-OFVn without strong donor and acceptor units exhibit two-photon absorption properties, and the two-photon absorption cross sections (δ(max)) increase with increasing the number of fluorene-vinylene units in the arms. The maximum value of δ(max) reaches 8073 GM for compound Tr-OFV4, which made it one of the most competitive compounds with enhanced TPA cross section. It provides a new platform for exploiting strong TPA compounds, in which the extended π-conjugated systems are involved in the absence of strong donor and acceptor units.
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China.
Huipeng
H
Zhou
Xin
X
Zhao
Tianhao
T
Huang
Ran
R
Lu
Hanzhuang
H
Zhang
Xiaohui
X
Qi
Pengchong
P
Xue
Xingliang
X
Liu
Xiaofei
X
Zhang
D000042:Absorption; D005449:Fluorenes / Q000737:chemistry*; D047028:Macrocyclic Compounds / Q000138:chemical synthesis*; D015394:Molecular Structure; D017785:Photons; D014753:Vinyl Compounds / Q000138:chemical synthesis*
D005449:Fluorenes; D047028:Macrocyclic Compounds; D014753:Vinyl Compounds