MOLECULES
·
2021
·Vol. 27
·期 1
·85
·
IF 4.412
Long Chen,Cuiyu Wu,Zheng Xie,Chenghua Sun,Shuyun Zhou
With the advancement of ultra-fast and high-energy pulsed laser output, lasers have caused serious harm to precision instruments and human eyes. Therefore, the development of optical limiting materials with a fast response, low optical limiting threshold, and high damage threshold are important. In this work, for the first time, it is reported that phosphors Gd2O2S:Tb3+(GOS) displays exceptional functionality in laser protection. GOS with sizes of 11 μm, 1 μm, and 0.45 μm are prepared. Based on the optical limiting and Z-scan technology systems under 532 nm and 1064 nm nanosecond laser excitation, the nonlinear optical properties of GOS are investigated. It is found that GOS exhibits outstanding optical limiting properties. In addition, the optical limiting response of GOS is size-dependent. Concerning the largest particle size, GOS has the best nonlinear optical response, while the precursor shows no nonlinear optical performance. Meanwhile, GOS doped gel glass also displays excellent optical limiting properties with high transmittance, which preliminarily validates the application of GOS and other scintillators in nonlinear optics and encourages more research to better realize the potential of GOS.Keywords:scintillator;nonlinear optics;optical limiting;size-dependent
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Yuting Wang,Xiong Shen,Chenggang Yuan,Bingkun Chen,Lin Chen,Zhongming Wang,Fei Hu,Qiuyun Ouyang
Halide perovskite (Cs 3 Cu 2 Br 5 ) is synthesized by a thermal injection method. The X-ray diffraction (XRD) proves that the Cs 3 Cu 2 Br 5 crystal phase is an intersection phase. The Cs 3 Cu 2 Br 5 organic glasses are fabricated by dispersing Cs 3 Cu 2 Br 5 materials in methyl methacrylate (MMA). The nonlinear absorption (NLA) and the nonlinear refraction (NLR) performances of Cs 3 Cu 2 Br 5 /PMMA organic glasses are measured via the open-aperture (OA) and the closed-aperture (CA) Z-scan technique, respectively. The samples show typical reverse saturable absorption (RSA) and self-focusing effect with the change of input energy (40–72 μJ). Meanwhile, the room-temperature photo-luminescence (PL) measurement reveals light emission for Cs 3 Cu 2 Br 5 . The effects on nonlinear optical (NLO) properties are investigated by controlling the input energy and the amount of the sample. The Cs 3 Cu 2 Br 5 /PMMA organic glasses exhibit excellent NLA and NLR properties. The NLA coefficient of (Cs 3 Cu 2 Br 5 ) 18 /PMMA organic glass is much higher than those of lead-containing perovskite such as CsPbCl 3 and CsPbBr 3 nanosheets . This results in Cs 3 Cu 2 Br 5 /PMMA organic glasses show superior optical limiting (OL) performance. The Cs 3 Cu 2 Br 5 perovskite materials show great potential in devices such as light-emitting diodes and optical switches.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Aggregate
·
2022
·Vol. 4
·期 2
·e264
·
IF 0
San-Tai Wang,Ya-Jie Liu,Cheng-Cheng Feng,Wei-Hui Fang,Jian Zhang
It is of great interest to modulate the photophysical properties by atomically precise chemical control. The incorporation of conjugated ligands into crystalline materials provides a platform for molecular-level interpretation of the structure-activity relationship. Herein, we reported the phenol-thermal and scale-up synthesis of a new family of remarkably stable aluminum molecular rings. They are assembled by twenty Al III ions with large conjugated ligands and phenols, representing the currently largest sizes (up to 4 nm in diameter) in the field of main group metal oxo clusters. Phenols are not only reaction medium but also auxiliary bridging ligands on the surface of macrocyclic molecules. In addition, they are either parallel to the center of the molecular ring or inserted into the molecular ring, or form dimers/tetramers that bind macrocyclic molecules to form supramolecular structures. These macrocyclic rings are hydrophobic and ultra-stable, evidenced by retaining their morphology and crystalline when exposed to air for more than a year. Compared with the pristine conjugated ligands, they exhibit coordination-enhanced fluorescence. By dispersing them into a polydimethylsiloxane (PDMS) matrix, we prepared transparent and flexible PDMS thin films for coupling flexible display and nonlinear optical application. Our discovery of such atomically precise rings provides a platform for the fine-tuning of photo-related performances.
研究领域:
化学
·
材料科学
·
光学
✓ 已验证
产品关联
DOI
Nanomaterials
·
2019
·Vol. 9
·期 5
·730
·
IF 4.034
Yuyu Ren,Lili Zhao,Yang Zou,Lixin Song,Ningning Dong,Jun Wang
TiO2/reduced graphene oxide (rGO) nanocomposites with two different TiO2particle sizes were synthesized by a facile hydrothermal method using two different source materials of Ti: tetrabutyl titanate (TBT) and commercial TiO2powder (P25). For respective series with the same source materials, we investigated additions that optimized the nonlinear optical properties (NLO) and optical limiting (OL) performances, and we explored the relationships between structural diversity and performance. Several characterization techniques, including X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and diffuse reflectance ultraviolet-visible spectroscopy (UV-Vis) were conducted to confirm the microstructures and chemical states of as-prepared materials. This indicated the existence of the Ti–O–C bond between rGO sheets and TiO2particles and the reduction from precursor graphene oxide (GO) to rGO. The results of UV-Vis spectra revealed that the TiO2/rGO nanocomposites showed smaller band gaps than bare TiO2. A nanosecond open-aperture Z-scan technique at 1064 nm was applied to investigate NLO and OL properties. TiO2/rGO nanocomposites exhibited enhanced NLO and OL performances, arising from synergistic effects, compared to individual components. The TBT series samples performed better than the P25 series, presumably relevant to dimensional effects.Keywords:optical limiting;TiO2;reduced graphene oxide;nanocomposites
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2022
·Vol. 2022
·期 29
·e202200376
·
IF 2.551
Zhuang-Hua Liu,Ran-Qi Chen,San-Tai Wang,Ya-Jie Liu,Wei-Hui Fang,Jian Zhang
Graphical The solvothermal synthesis of low nuclearity aluminum clusters to polynuclear aluminum clusters was achieved by regulating the amount of nitrogen-containing ligands. Present herein is the currently largest catecholato-based aluminum oxo clusters. By adjusting the amount of auxiliary 3, 5-dimethylpyrazole ligands, the synthesis of aluminum oxo clusters (AlOCs) ( AlOC-86 ) to high nuclearity AlOCs ( AlOC-88 ) were successfully achieved. Such synthetic strategy is applicable to imidazole ligands and new compounds ( AlOC-87 and AlOC-89 ) were obtained. Single crystal analysis shows that AlOC-86 and AlOC-87 are hexanuclear clusters made up of two edge-sharing tetrahedral clusters. The nuclearity of compounds AlOC-88 and AlOC-89 is doubled and they are S-shape dodecanuclear AlOCs. The aggregation of such clusters is attributed to the labile sites on the two ends of the hexanuclear clusters. In addition, open aperture (OA) Z-scan measurements results indicate that these compounds exhibit manifest reverse saturation absorption (RSA) response.
研究领域:
无机化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Boying Yang,Zhao Zhang,Yuxia Luo,Xinping Li,Hui Chang
In this research, the introduction of chirality into carbon quantum dots (CQDs) successfully facilitated the formation of chiral carbon quantum dots (CCQDs). These CCQDs manifested excellent photophysical properties. Moreover, chirality was exploited as a key factor to modulate the optical power limiting (OPL) properties of the CQDs. Chiral activities of precursors l / d -threonine (Thr) and l / d -cysteine (Cys) were used to prepare l / d -ThrCQD and l / d -CysCQD, respectively. The OPL performance of l / d -CysCQD was better than that of l / d -ThrCQD, because the band gap of l / d -CysCQD, containing N and S elements, was smaller than that of l / d -ThrCQD doped with N atoms. The carbon core formed by combining N and S atoms with sp 2 hybridized carbon had a structure similar to D–π–A. This enhanced the electron transport ability, reduced the band gap, and improved the OPL performance. Additionally, the Z-scan test results showed a difference in OPL between the l - and d -types, with d -type CCQDs having higher nonlinear absorption coefficients than l -type CCQDs. To investigate this phenomenon, the band gaps were calculated, and it was determined that the d -type band gap was smaller than that of the l -type. This affected the former’s electron transfer and improved its OPL performance. This result provides new avenues for the practical application of CQD chiral modulation in the field of OPL.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Yihang Song,Fan Li,Guang-Hui Chen,Jiao Wu,Xiaofeng Yi,Jian Zhang
Indium-oxo clusters (InOCs) represent a relatively underexplored class within metal-oxo cluster chemistry, with limited research on their core structures, functional modifications, and performance characteristics. In this study, we introduce eight distinct aliphatic and aromatic carboxylate ligands into bixbyite-like In₁₂-oxo clusters ( InOC-7 to InOC-14 ), utilizing the labile substitution sites on the robust In₁₂ skeleton. This ligand incorporation enhances electronic delocalization, narrows the bandgap, and promotes extensive intermolecular π-π interactions. Building upon these structural features and heavy metal effects, the optical limiting (OL) properties of these clusters were systematically investigated. The clusters exhibit characteristic reverse saturable absorption (RSA) behavior, with InOC-8 and InOC-12 demonstrating particularly outstanding OL performance. The excellent optical limiting properties of these crystalline InOCs make them highly relevant to the Journal of Solid State Chemistry , which focuses on the properties and applications of solid materials. This study highlights the scientific value of functionalizing InOCs through labile sites, enriching their structural chemistry, fine-tuning their optical limiting properties, and opening new avenues for potential applications.
研究领域:
材料化学
·
固体化学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Zulfiqar Ali,Fei Hu,Muhammad Sohail,Intikhab Alam,Nimra Razzaq,Qiuyun Ouyang
The Bi 2 WO 6 /ZnO (BWO/ZnO) composites were synthesized by using a hydrothermal method. Then, the BWO/ZnO composites were poured into methyl methacrylate through polymerization to make the BWO/ZnO/PMMA organic glasses (OGs) with different amounts. The X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to investigate the crystal structures and morphology size of BWO/ZnO composites. The nonlinear absorption (NLA), nonlinear refraction (NLR) and optical limiting (OL) properties were systematically investigated by using the Z-scan technique at 532 nm. The BWO/PMMA and BWO/ZnO/PMMA OGs may transform from saturable absorption (SA) to reverse saturable absorption (RSA) by varying the input energy. The NLA, NLR and OL performances of the BWO/ZnO/PMMA OGs are superior to those of the BWO/PMMA OGs and other bismuth-based metal oxides. The synergistic interaction of BWO and ZnO plays a crucial role in the BWO/ZnO/PMMA OGs. The NLA mechanisms were analyzed using an energy-level model.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Chenggang Yuan,Yuting Wang,Xiong Shen,Bingkun Chen,Fei Hu,Lin Chen,Zhongming Wang,Qiuyun Ouyang
CsPbBr 3 perovskite quantum dots (QDs) material was synthesized by a hot injection method. CsPbBr 3 /PMMA organic glasses (OGs) were fabricated by dispersing CsPbBr 3 QDs in methyl methacrylate (MMA). The open-aperture (OA) and closed-aperture (CA) Z-scan technique were used to investigate the nonlinear absorption (NLA) and nonlinear refraction (NLR) property of CsPbBr 3 /PMMA organic glasses, respectively. The changeover from saturable absorption (SA) to reverse saturable absorption (RSA) was observed in CsPbBr 3 /PMMA organic glasses with the increasing of the input energy (30–110 μJ). When the input energy is 110 μJ, the NLA coefficient is β = 1.43 × 10 2 cm GW −1 and the NLR coefficient is γ = −4.5 × 10 −4 cm 2 GW −1 . CsPbBr 3 /PMMA organic glasses exhibit excellent optical limiting (OL) performance due to the enhanced NLA and NLR effects. The results show that CsPbBr 3 QDs can be used for laser protection.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2023
·
IF 8.6
Xiaohui Sun,Xiaofeng Yi,Jian Zhang,Lei Zhang
It is extremely challenging but critical to regulate the structural attributes and physicochemical behaviors of metal-oxo clusters in a controllable manner. Connecting versatile building units and importing aromatic ligands into crystalline materials facilitates the construction of unprecedented structures and provides a platform for the interpretation of structure–activity relationships at the molecular level. In this work, the solvent effect and organic-ligand-induced effect are exploited to formulate and regulate the variety and connection modes of cuboidal {M4X4} building units (M= In, Ni; X= O, Cl) in a controlled and incremental fashion. Not only were the inorganic basic-cubane and its dimeric analogue isolated but also their hexameric aggregation into an In10Ni8-oxo cluster with a wheel-shaped architecture was realized with the assistance of aromatic carboxylates. The In10Ni8-oxo cluster presents the largest size record in the realm of InOCs, and its peripheral surface could be modified to modulate their corresponding physicochemical properties; in particular, the benzoate and naphthoate groups can bring in abundant π···π stacking interactions. Based on the results of Z-scan third-order nonlinear optical (NLO) measurements, these clusters present high reverse saturable absorption (RSA) suitable as optical limiting (OL) materials and constitute an instructive comparison that the general trend of the OL effect is gradually enhanced with the accumulation of more {M4X4}-cubanes including heavy atoms as well as richer and stronger π···π stacking interactions and better delocalization. This work not only starts the research on InOCs-based optical limiting materials but also provide strategies of regulating building units for constructing heterometallic clusters.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2020
·
IF 3.286
Jiale Ding,Zengduo Cui,Ningning Dong,Bolong Li,Yunhe Zhang,Jun Wang,Zhenhua Jiang
At present, the extensive research on laser protective materials is mainly focused on ensuring the linear transmittance and improving the optical limiting ability. Phthalocyanine has become a promising optical limiting material because of its special large π electronic conjugated structure, which makes it has excellent nonlinear optical properties and fast optical-electron response. Here, we synthesized a sulfonyl-containing hyperbranched lanthanum phthalocyanine (HLaPc) and covalently linked the anthraquinone groups (HLaPc-HAQ) in its axial direction. Since a donor-acceptor system is formed between phthalocyanine and the anthraquinone in HLaPc-HAQ, the electron transfers can effectively enhance the nonlinear optical properties of HLaPc-HAQ. According to the “like dissolves like” theory, two kinds of homogeneous films have been obtained by blending HLaPc and HLaPc-HAQ with yellow polyphenylene sulfoxide containing anthraquinone groups (YPPSU). The films obtained by solution casting method have high transmittance and excellent optical limiting properties. Especially, the Z-scan results show that the lowest incident intensity threshold (I lim ) of HLaPc-HAQ/YPPSU can reach 0.012 J cm -2 , and the linear transmittance can still maintain above 57%. This means that the materials obtained in this work surpassed much previously reported work in terms of comprehensive linear transmittance and optical limiting performance. In addition, the energy level model was drawn by the results of the cyclic voltammogram of the solution and the solid films. And from the perspective of the energy level transition, it was confirmed that there are a larger proportion of molecules in the solid films for intersystem crossing, thereby improving optical limiting performance.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Systems Design & Engineering
·
2022
·Vol. 8
·期 2
·240-250
·
IF 4.92
He Zhang,Lucheng Li,Luyi Wang,Jun Chen,Jing Wang,Yang Liu,Huijie Zhang,Qiang Wang
The development of effective laser protectors to protect human eyes and all optical and photoelectric sensors from temporary or permanent damage caused by laser beams is both of great military significance and a focus of social and public security. In this work, a blue glass of In-Pc-In-PMMA is prepared by doping dinuclear indium phthalocyanine (In-Pc-In) into polymethyl methacrylate (PMMA) glass. The photophysical and nonlinear optical limiting behaviors are investigated and compared with In-Pc-In-THF solution (In-Pc-In-THF). The results indicate that the fluorescence lifetimes of In-Pc-In-THF are τ1 = 0.49 ns (A1 = 9.3%) for the monomer and τ2 = 5.51 ns (A2 = 90.7%) for the dimer. However, for the In-Pc-In-PMMA sample, the fluorescence lifetimes are significantly different from those of In-Pc-In-THF, whose fluorescence lifetimes are τ1 = 1.16 ns (A1 = 51.4%) for the monomer and τ2 = 4.47 ns (A2 = 48.6%) for the dimer, indicating that the fluorescence lifetimes of In-Pc-In-PMMA are dominated by monomers and supplemented by dimers. As a result, the In-Pc-In-PMMA glass presents a larger nonlinear absorption coefficient than that of In-Pc-In-THF solution, which provides a new concept for developing high-performance and practical optical-limiting devices.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）