Novel nonlinear optical push\u2013pull fluorene dyes chromophore as promising materials for telecommunications

Fuyang Huo,Hua Zhang,Jialei Liu,Shuhui Bo,I V Kityk,Ling Qiu,Zhuo Chen

doi:10.1007/s10854-019-01576-7

Abstract

Two principally novel chromophores A, B based on fluorene electron donor were synthesized and explored by 1H NMR, 13C NMR, and MS spectra. The delocalized energy levels have been estimated by UV–Vis absorption spectra. The principal innovation consists in modification by addition of amino group. The titled materials have demonstrated a high solubility in common organic solvents, good compatibility with polymers. The maximally achieved electro-optic efficiency of the poled film possessing 25 wt% of A doped in PMMA (25 wt% A/PMMA) achieved a value of 18 pm/V at wavelength 1310 nm, and 25 wt% B/PMMA possessed an electrooptical coefficient equal to 43 pm/V. This one open a perspective of their direct application in optoelectronic telecommunication devices for laser light modulation.

Highlights

The design and search of novel promising chromophores materials for the optoelectronic applications is very important for modern organic materials science engineering due to their promising parameters with respect to high-speed and broadband telecommunication technology [1–6]
Fluorene modified by amino groups have been syntehsized as a principally novel electron donor group
The results demonstrate a good performance of chromophores A and B

Summary

Introduction

The design and search of novel promising chromophores materials for the optoelectronic applications is very important for modern organic materials science engineering due to their promising parameters with respect to high-speed and broadband telecommunication technology [1–6]. For wide applications, one of the restraining factor consists in reliable production of excellent organic electro-optic (EO) modulator materials to develop NLO chromophores with relatively high first-order hyperpolarizability (β). To obtain sufficiently high EO activity and suppress the undesirable dipole–dipole interactions among the chromophores, an appropriate molecular design has been made using the conjugated push–pull molecules. Many efforts have been made here to design and synthesize novel NLO chromophores, searching the NLO molecules with higher electrooptical coefficients (r33) [15–17]. The previous efforts for the NLO chromophores were mainly focused on the construction of the extended charge transfer pi-electron bridges and electron acceptors [16–19]. Following the mentioned above one can conclude that design and fabrication of novel conjugated groups with stronger electrondonating ability is still extremely desirable

Methods

Results

Conclusion