Platinum(ii) acetylide complexes with star- and V-shaped configurations possessing good trade-off between optical transparency and optical power limiting performance

Abstract

Two series of Pt(ii) acetylide complexes containing dimesitylborane and phenyl terminal groups with star- and V-shaped configurations were synthesized.

Rise of Conjugated Poly-ynes and Poly(Metalla-ynes): From Design Through Synthesis to Structure–Property Relationships and Applications

“…It has been well-established that the NLO parameters of oligo-/poly-ynes could be modulated through various means: extending conjugation length, incorporating D-A groups, increasing the content of transition metal ions, metallic end-capping, etc. ,,− In addition to the linear Pt­(II) oligo- and poly-ynes, several other metalla-ynes viz. cross-conjugated, branched, triangular Pt­(II) acetylide complexes, etc. − have been reported with excellent OPL properties. Recently, Li et al .…”

1,3,5-Triazine-Based Pt(II) Metallogel Material: Synthesis, Photophysical Properties, and Optical Power-Limiting Performance

“…The highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) were calculated using density functional theory (DFT) at the 6-31G­(d) level for C, H, N, O and P and at the Lanl2DZ level for Pt atoms. , The energies of the excited states of the complexes were computed by TD-DFT on the basis of all ground-state geometries. All calculations were performed by using the Gaussian 09 program…”

“…Among those complexes used to fabricate organometallic gels, square-planar Pt­(II) acetylide complexes have attracted wide attention, − in which the extents of the d 8 –d 8 Pt–Pt interaction and the π–π interaction of the ligand play an important role in tuning their spectroscopic and optical properties. , In addition, on the basis of the efficient intersystem crossing (ISC), high emission quantum yield, long-lived excited state, and strong excited state absorption (ESA), Pt­(II) acetylide complexes have exhibited extensive application in low-power upconversion, photoinduced charge separation, light-emitting materials, chemosensors, nonlinear optics, − etc. Therefore, the introduction of Pt­(II) acetylide complexes in organometallic gels could be expected to contribute to the generation of novel metallogel materials for optical functional applications.…”

Doubly 1,3-butadiyne-bridged ditwistacene with enhanced ultrafast broadband reverse saturable absorption

“…Even though a number of materials have been demonstrated to act as dual-mode absorbers, [5][6][7] some disadvantages, such as their small TPA cross sections and weak absorption abilities in the picosecond and femtosecond regimes due to the formation of excited triplet states, hinder the practical applications of these materials in ultrafast broadband OPL. [8][9][10] So, organic materials with strong TPA and broadband singlet ESA are more appreciated as ultrafast optical limiters. 11 Previous works have shown that large p-conjugated systems with various donor and acceptor groups are more likely to exhibit excellent reverse saturable absorption (RSA) behavior.…”