Unconventional Heterobidentate Coordination of 4-Hydroxypyridine Leading to Remarkably Strong Second-Harmonic Generation in Zn(CHNO).

Herein, we report an unconventional heterobidentate coordination mode of conventional 4-hydroxypyridine ligand in a novel compound Zn(CHNO). The strong heterobidentate coordination interactions between Zn and 4-hydroxypyridine ligands promote a uniform alignment of the polarization of each [ZnON] tetrahedral building unit, resulting in remarkably strong second-harmonic generation (SHG) with an intensity that is the largest among all UV-transparent Zn-containing metal-organic compounds reaching 13.6×KDP.

Unveiling Noncentrosymmetric Pyridine Carboxylates from Centrosymmetric Templates through Motif Configuration Modulation in Zero-Dimensional System.

Developing approaches to induce noncentrosymmetric (NCS) frameworks through atomic-scale structural optimizations is crucial due to the growing need for new ultraviolet (UV) nonlinear optical (NLO) materials. Herein, the first two new NCS pyridine carboxylates, ZnBr(CHFNO) () and Cd(CHFNO)(HO) (), were successfully synthesized using centrosymmetric (CS) templates and rational structural reconstructions induced by different ionic radius. Both compounds crystallize in the orthorhombic system and feature metal-centered zero-dimensional (0D) isolated clusters.

Breaking Symmetry for SHG Response: Lanthanide Acetate Crystals via Water Molecule Regulation Strategy.

In the field of nonlinear optical (NLO) materials research, the design and synthesis of novel materials are crucial for advancing modern scientific and technological development. This study employs an innovative coordination strategy, building upon the existing structure of [Ln(CHCOO)(HO)]·4HO (Ln = Tb, Sm), to successfully synthesize a series of acetate rare-earth metal compounds [Ln(CHCOO)(HO)] [Ln = Tb(), Er(), Y()] by regulating the number of water molecules. This approach achieved a structural transition from centrosymmetric (CS) to noncentrosymmetric (NCS), endowing these compounds with significant nonlinear optical responses.

A protoplast-based transient gene expression assay for the identification of heat and oxidative stress-regulatory genes in perennial ryegrass.

Background: With the accumulating omics data, an efficient and time-saving transient assay to express target genes is desired. Mesophyll protoplasts, maintaining most stress-physiological responses and cellular activities as intact plants, offer an alternative transient assay to study target genes' effects on heat and oxidative stress responses.

Results: In this study, a perennial ryegrass (Lolium perenne L.

From Cd(SCN)(CHNS) to Cd(SCN)(CHN): Controlling Sulfur Content in Thiocyanate Systems Significantly Improves the Overall Performance of UV Nonlinear Optical Materials.

Combining a strong second-order nonlinear optical (NLO) effect (>1×KHPO (KDP)), a large band gap (>4.2 eV), and a moderate birefringence in ultraviolet (UV) NLO crystals remains a formidable challenge. Herein, Cd(SCN)(CHN), the first example of a thiocyanate capable of realizing a phase-matched UV NLO crystal material, is obtained by reducing the sulfur (S) content in the centrosymmetric (CS) structure of Cd(SCN)(CHNS).

From CHNGeSnBr to CHNGeSnBr: Effective Modulation of the Second Harmonic Generation Effect and Optical Band Gap by Planar π-Conjugated Organic Cation Size.

In the search for nonlinear optical (NLO) materials with excellent overall performance, we have devoted ourselves to organic-inorganic hybrids consisting of anionic groups containing stereochemically active lone-pair (SCALP) electron cations and organic planar π-conjugated group cations. Accordingly, in this paper, two novel organic-inorganic hybrid metal halides, CHNGeSnBr (I) and CHNGeSnBr (II), have been synthesized. The powder second-harmonic technique shows that both CHNGeSnBr and CHNGeSnBr have moderately strong second-order nonlinear optical effects, which are about 2.