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Combining a strong second‐order nonlinear optical (NLO) effect (>1×KH2PO4 (KDP)), a large band gap (>4.2 eV), and a moderate birefringence in ultraviolet (UV) NLO crystals remains a formidable challenge. Herein, Cd(SCN)2(C4H6N2)2, 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)2(CH4N2S)2. Compared to the "shoulder‐to‐shoulder" one‐dimensional (1D) chain of Cd(SCN)2(CH4N2S)2, Cd(SCN)2(C4H6N2)2 has a different sawtooth 1D chain structure. Cd(SCN)2(CH4N2S)2 has second harmonic generation (SHG) inertia with a band gap of 3.90 eV and a UV cutoff edge of 342 nm, however, it possesses a large birefringence (0.35@546 nm). In contrast, the symmetry center breaking of Cd(SCN)2(C4H6N2)2 leads to remarkably strong SHG intensity (10 times that of KDP). Furthermore, it has a wide band gap (4.74 eV), short UV cutoff edge (234 nm), and moderate birefringence capable of phase matching (0.17@546 nm). This research indicates that thiocyanates are a promising class of UV NLO crystal materials, and that modulation of the sulfur content of CS thiocyanates is an effective strategy for the development of UV NLO crystals with excellent overall performances. [ABSTRACT FROM AUTHOR]

The discovery and designed synthesis of multifunctional materials is a leading pursuit in materials science. Herein, we report a novel hydro-isocyanurate, N 2 H 4 Zn(HC 3 N 3 O 3 ), which combines strong second harmonic generation (SHG) and ultra-long room-temperature phosphorescence (RTP). The SHG intensity is the highest within the cyanurate system (13 × KDP), and RTP lifetime extends up to 448 ms, accompanied by a long-lasting afterglow visible to the naked eye for 1.2 s, surpassing most of the current metal-organic complexes. This advancement holds promise for the development of multifunctional optoelectronic devices, particularly leveraging second-harmonic generation (SHG) processes., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)

Combining a strong second-order nonlinear optical (NLO) effect (>1×KH 2 PO 4 (KDP)), a large band gap (>4.2 eV), and a moderate birefringence in ultraviolet (UV) NLO crystals remains a formidable challenge. Herein, Cd(SCN) 2 (C 4 H 6 N 2 ) 2 , 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) 2 (CH 4 N 2 S) 2 . Compared to the "shoulder-to-shoulder" one-dimensional (1D) chain of Cd(SCN) 2 (CH 4 N 2 S) 2 , Cd(SCN) 2 (C 4 H 6 N 2 ) 2 has a different sawtooth 1D chain structure. Cd(SCN) 2 (CH 4 N 2 S) 2 has second harmonic generation (SHG) inertia with a band gap of 3.90 eV and a UV cutoff edge of 342 nm, however, it possesses a large birefringence (0.35@546 nm). In contrast, the symmetry center breaking of Cd(SCN) 2 (C 4 H 6 N 2 ) 2 leads to remarkably strong SHG intensity (10 times that of KDP). Furthermore, it has a wide band gap (4.74 eV), short UV cutoff edge (234 nm), and moderate birefringence capable of phase matching (0.17@546 nm). This research indicates that thiocyanates are a promising class of UV NLO crystal materials, and that modulation of the sulfur content of CS thiocyanates is an effective strategy for the development of UV NLO crystals with excellent overall performances., (© 2024 Wiley-VCH GmbH.)

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, C 4 H 7 N 2 Ge 0.4 Sn 0.6 Br 3 (I) and C 6 H 11 N 2 Ge 0.4 Sn 0.6 Br 3 (II), have been synthesized. The powder second-harmonic technique shows that both C 4 H 7 N 2 Ge 0.4 Sn 0.6 Br 3 and C 6 H 11 N 2 Ge 0.4 Sn 0.6 Br 3 have moderately strong second-order nonlinear optical effects, which are about 2.03 (I) and 1.16 (II) times that of KH 2 PO 4 (KDP), respectively. They also have different optical band gaps of 2.75 (I) and 2.88 eV (II) due to the different sizes of the organic cations, and their photoluminescent and thermal properties were also investigated. This work provides new structural insights for the design and modulation of organic-inorganic hybrid halide materials with multiple excellent optical properties.

Due to the highly contagious nature of the Omicron variant of SARS-CoV-2 and its subvariants, a high rate of transmission was observed throughout Chengdu, China, within 2 weeks of the relaxation of COVID-19 measures on December 3, 2022, particularly in hospitals. Hospitals experienced different degrees of medical overcrowding during the first 2 weeks, with a high patient volume in the emergency departments and a significant lack of beds in the medical wards, particularly in the respiratory intensive care unit (ICU) and ICU. The authors' place of employment, Chengdu Jinniu District People's Hospital, is a tertiary B-level public hospital situated in the Jinniu District in northwest Chengdu. The hospital's emergency coordination and response efforts emphasized addressing patients' difficulties in obtaining medical care and hospitalization in the region and keeping the mortality rate of patients with pneumonia to a minimal level. It has been emulated by sister hospitals and was well received by the local populace and municipal government. The hospital made the following significant alterations and modifications to this emergency medical care: (1) immediate establishment of the General ICU (GICU), a temporary unit set up in emergency situations that had most of the functions of but was not as complete as the ICU and had a lower ratio of doctors to nurses; (2) dynamic adjustment of anesthesiologists and respiratory physicians jointly stationed in the GICU; (3) choice of nurses with extensive experience in internal medicine and allocation to the GICU according to a 2:3 ICU bed to nurse ratio; (4) emergency purchase or deployment of pneumonia-related treatment equipment; (5) implementation of the GICU resident rotation system; (6) "twinning" of internal medicine and other departments to add beds; and (7) implementation of uniform hospital bed allocation for inpatients.