Journal of Luminescence最新文献_第7页

Photoluminescence enhancement in lead-free copper-alloyed metal halide

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-12-25 DOI: 10.1016/j.jlumin.2024.121048

Ranran Fan, Xiwen Zhang, Junpeng Qiao, Jiaxin Xu, Sujuan Feng, Guangqiang Liu

{"title":"Photoluminescence enhancement in lead-free copper-alloyed metal halide","authors":"Ranran Fan, Xiwen Zhang, Junpeng Qiao, Jiaxin Xu, Sujuan Feng, Guangqiang Liu","doi":"10.1016/j.jlumin.2024.121048","DOIUrl":"10.1016/j.jlumin.2024.121048","url":null,"abstract":"<div><div>In recent years, all-inorganic cesium lead halide perovskites have attracted wide attention due to excellent features. Nevertheless, the problems of structure instability and toxicity of Pb greatly hinder their widespread applications. As a consequence, lead-free metal halides have become the research focus in the development of new materials and devices. In this paper, Cu(I)-alloyed Cs2AgBr3 was successfully synthesized, it had been found that trace amount of Cu ions could greatly enhance the luminescence efficiency. Theoretical calculation demonstrated that the incorporation of Cu distinctly regulated the materials' electronic band structure, the new formation of CuBr4 tetrahedron played an important role in the forceful restriction to the self-trapped excitons’ spatial distribution and contributed to the improvement of luminescence efficiency. In addition, this material displayed good structural stability under ambient conditions. These results demonstrated that the lead-free Cu(I)-alloyed Cs2AgBr3 could become hopeful candidate in the optoelectronic fields.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"279 ","pages":"Article 121048"},"PeriodicalIF":3.3,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spectroscopic analysis of Mn4+-activated phosphors: Unveiling the relationship between energy levels and Racah parameters

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-12-24 DOI: 10.1016/j.jlumin.2024.121046

Jiquan Huang, Qiufeng Huang, Jian Chen, Zhonghua Deng, Zhuguang Liu, Wang Guo

{"title":"Spectroscopic analysis of Mn4+-activated phosphors: Unveiling the relationship between energy levels and Racah parameters","authors":"Jiquan Huang, Qiufeng Huang, Jian Chen, Zhonghua Deng, Zhuguang Liu, Wang Guo","doi":"10.1016/j.jlumin.2024.121046","DOIUrl":"10.1016/j.jlumin.2024.121046","url":null,"abstract":"<div><div>Mn4+-activated red and deep-red phosphors hold promise for widespread applications in solid-state lighting. A deep understanding of the dependence of the excitation and emission energy levels of Mn4+ on its crystal field environment is essential for guiding the development of Mn4+-activated phosphors. By analyzing the photoluminescence spectral properties of Mn4+ in various hosts, this study investigates the relationship between its energy levels and the crystal-field and Racah parameters (Dq, B, and C), and establishes several universal empirical equations. In particular, equation E(2Eg)ZPL = 7B + 3.1C reveals the decisive role of the nephelauxetic effect on the zero-phonon line (ZPL) emission energy of the 2Eg → 4A2g transition. This formula, along with E(4T1g,a)ZPL = 10.5Dq + 8.9B, enables the precise prediction of the ZPL energy levels from crystal-field and Racah parameters, and vice versa. Furthermore, drawing attention to difficulty in determining the energy levels, we propose an alternative method to enhance the convenience and precision of estimating the ZPL excitation energies and Racah parameters. These findings provide valuable insights into the electronic structure and photoluminescence properties of Mn4+ ions in solids.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"280 ","pages":"Article 121046"},"PeriodicalIF":3.3,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Site occupancy of Sm3+, Pr3+, Tb3+ in Na5Y(WO4)4 and their photoluminescence spectra for application in plant growth LED and fingerprint detection

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-12-24 DOI: 10.1016/j.jlumin.2024.121045

Chenglong Xia , Jiahui Yang , Bingyang Zeng , Chunmiao Cui , Haoyuan Weng , Yue Guo , Xiaoguang Liu , Ling Li

{"title":"Site occupancy of Sm3+, Pr3+, Tb3+ in Na5Y(WO4)4 and their photoluminescence spectra for application in plant growth LED and fingerprint detection","authors":"Chenglong Xia , Jiahui Yang , Bingyang Zeng , Chunmiao Cui , Haoyuan Weng , Yue Guo , Xiaoguang Liu , Ling Li","doi":"10.1016/j.jlumin.2024.121045","DOIUrl":"10.1016/j.jlumin.2024.121045","url":null,"abstract":"<div><div>This study successfully synthesized Na5Y(WO4)4 doped with Sm³⁺, Pr³⁺, and Tb³⁺ using a high-temperature solid-state method. Photoluminescence spectra revealed that Na5Y(WO4)4:Sm³⁺ phosphors emits a strong red glow at 646 nm under the excitation of 405 nm, and has an extremely high quantum yield, suggesting their suitability for plant growth LED lighting applications. In contrast, Na5Y(WO4)4:Pr³⁺ phosphors displayed a lower efficiency but still aligned well with the red-wavelength absorption spectra of plants. Additionally, Na5Y(WO4)4:Tb³⁺ phosphors demonstrated strong green emission under UV light, indicating potential applications in fingerprint detection. The Site Occupancy Theory (SOT) was utilized to explain the preferential occupation of dopant ions, showing that Sm³⁺ and Tb³⁺ preferred Y1 sites, whereas Pr³⁺ favored Na2 sites.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"279 ","pages":"Article 121045"},"PeriodicalIF":3.3,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impacts of Si extension on the singlet states of phenylethynyl anthracene

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-12-24 DOI: 10.1016/j.jlumin.2024.121041

Erkan Aksoy

{"title":"Impacts of Si extension on the singlet states of phenylethynyl anthracene","authors":"Erkan Aksoy","doi":"10.1016/j.jlumin.2024.121041","DOIUrl":"10.1016/j.jlumin.2024.121041","url":null,"abstract":"<div><div>This study reports the synthesis, photophysical, and electrochemical characterization of a new silyl-extended fluorescent emitter in comparison to commercial BPEA with similar pi-conjugation structure. The structure of 9,10-Bis(TPhSi)A-Ant was anticipated to reduce aggregation tendency while also extending pi-conjugation. The singlet state behaviors of 9,10-Bis(TPhSi)A-Ant and BPEA in solution and film were investigated by photluminescence (PL), emission lifetime (ns TCSPC), fluorescence quantum yield (PLQY), and time resolved-PL spectroscopy. Compared to BPEA the addition of triphenylsilane was found to shift the fluorescence peak from 475 to 484 nm, and reduce the Stokes shift from 552.7 cm−1 to 303.2 cm−1. While both molecules exhibited almost 100 % PLQY in solution, both were found to suffer similar levels of concentration-induced emission quenching in films. 9,10-Bis(TPhSi)A-Ant despite its steric Si groups had lower film PLQY – likely due to increased reabsorption – while time-resolved PL spectroscopy confirmed a lower aggregation tendency. These results demonstrate both the steric and electronic effects of silyl extension, with relevance for the development of new photonic materials.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"279 ","pages":"Article 121041"},"PeriodicalIF":3.3,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Growth, luminescence, and Judd-Ofelt analysis of Pr3+ doped Bi3TeBO9 single crystal

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-12-20 DOI: 10.1016/j.jlumin.2024.121043

Weimin Dong , Yingjie Sun , Jing Li , Xinguang Xu , Victor Petrov , Jiyang Wang

{"title":"Growth, luminescence, and Judd-Ofelt analysis of Pr3+ doped Bi3TeBO9 single crystal","authors":"Weimin Dong , Yingjie Sun , Jing Li , Xinguang Xu , Victor Petrov , Jiyang Wang","doi":"10.1016/j.jlumin.2024.121043","DOIUrl":"10.1016/j.jlumin.2024.121043","url":null,"abstract":"<div><div>A Pr3+:Bi3TeBO9 (Pr:BTBO) single crystal with a high Pr3+-doping concentration (1.85 × 1021 ions/cm3) was grown by the top-seeded solution growth (TSSG) method. The absorption and emission spectrum were measured at room temperature and the spectroscopic parameters were calculated based on the Judd-Ofelt (J-O) theory. The results show that Pr:BTBO crystal has a large absorption cross-section of 2.009 × 10−20 cm2 with broad full widths at half maximum (FWHM) of 11.73 nm at 448 nm. The emission cross-section for 3P0→3F2 at 647 nm was calculated to be 7.06 × 10−19 cm2, which is larger than most Pr3+-doped oxide crystals. Despite the high Pr3+ doping concentration of Pr:BTBO, its fluorescence lifetime (958.9ns) and quantum efficiency (14.3 %) of the 3P0 level are still larger than those of most Pr3+-doped borate crystals. In addition, the optical gain for 3P0→3F2 as well as the chromaticity coordinates and color purity of the fluorescence spectrum, were also evaluated. The present work suggests that Pr:BTBO crystal was a potential candidate for visible solid-state lasers.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"279 ","pages":"Article 121043"},"PeriodicalIF":3.3,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement of photoluminescence from rare-earth ions in fluoride crystals by ion-implanted silver nanoparticles

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-12-20 DOI: 10.1016/j.jlumin.2024.121044

V.L. Paperny , A.A. Chernykh , A.S. Ishchenko , S.V. Murzin , A.S. Myasnikova , E.A. Radzhabov , R. Yu Shendrik , E.F. Martynovich , V.P. Dresvyansky

{"title":"Enhancement of photoluminescence from rare-earth ions in fluoride crystals by ion-implanted silver nanoparticles","authors":"V.L. Paperny , A.A. Chernykh , A.S. Ishchenko , S.V. Murzin , A.S. Myasnikova , E.A. Radzhabov , R. Yu Shendrik , E.F. Martynovich , V.P. Dresvyansky","doi":"10.1016/j.jlumin.2024.121044","DOIUrl":"10.1016/j.jlumin.2024.121044","url":null,"abstract":"<div><div>The luminescent characteristics in the visible and near infrared spectral ranges of both pure MeF2 fluoride crystals (Me = Ba, Ca and Sr) and those doped with Er3+ ions, which are implanted with high-energy (∼100 keV) silver ions are studied. It is found that in the former case, a thin surface layer of the irradiated crystals emit a composite band in the spectral range of 450–1000 nm (λexc = 405 nm), caused by the luminescence of the formed silver nanoparticles. In the latter case, only the luminescence bands of Er3+ ions are recorded, the intensity of which are enhanced significantly (for instance, up to near 4 times for CaF2:Er3+ sample) compared to the virgin, i.e. non-irradiated, samples. This is experimental evidence in favor of the fact that the observed increase in the luminescence of Er3+ ions is due to non-radiative energy transfer to them from excited silver NPs, which form a layer about 100 nm thick in the irradiated crystal.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"279 ","pages":"Article 121044"},"PeriodicalIF":3.3,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A flexible, long afterglow film with Bi-activated garnet phosphors for dynamic anti-counterfeiting applications

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-12-20 DOI: 10.1016/j.jlumin.2024.121042

Chenxi Guo , Mingxue Deng , Dongxin Shi , Xinyu Gong , Siyi Yu , Mengchao Xue , Keke Han , Boyuan Wang , Jiacheng Wang , Fengfeng Li

{"title":"A flexible, long afterglow film with Bi-activated garnet phosphors for dynamic anti-counterfeiting applications","authors":"Chenxi Guo , Mingxue Deng , Dongxin Shi , Xinyu Gong , Siyi Yu , Mengchao Xue , Keke Han , Boyuan Wang , Jiacheng Wang , Fengfeng Li","doi":"10.1016/j.jlumin.2024.121042","DOIUrl":"10.1016/j.jlumin.2024.121042","url":null,"abstract":"<div><div>Fluorescent materials have been widely used in the field of anti-counterfeiting, but traditional fluorescent patterns are static by design, which only offer a limited level of security for anti-counterfeiting encryption. Herein, we provide a novel dynamic anti-counterfeiting strategy by constructing a flexible, long afterglow film with Bi-activated Sr3Y2Ge3O12 phosphors. Theoretical calculation indicates that the Sr3Y2Ge3O12 garnet matrix with suitable energy bands shows high adaptability for Bi ions activator to produce long afterglow emission. Doping of Bi ions into the framework of Sr3Y2Ge3O12 exhibits a blue luminescence centered around 469 nm. The afterglow intensity and decay time reach the optimal with Bi3+ doping concentration of 0.75 mol%. Various characterizations show that the electron traps mainly come from oxygen vacancies in the long afterglow process, and a possible afterglow mechanism is also proposed. A flexible, long afterglow film prepared by compositing with Sr3Y2Ge3O12:Bi3+ can be written into the image information by ultraviolet light and present a dynamic image in the form of afterglow. The information decryption could be further performed by thermal excitation. The results illustrate that the Bi-activated Sr3Y2Ge3O12 flexible film is a potential luminescent material that can be used for dynamic anti-counterfeiting and encryption.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"279 ","pages":"Article 121042"},"PeriodicalIF":3.3,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unique strategy for achieving excellent luminous efficiency and high saturation threshold for high-power Laser–Driven lighting

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-12-19 DOI: 10.1016/j.jlumin.2024.121040

Zhanhao Fan , Mingwei Fu , Peng Qiao , Youjie Hua , Feifei Huang , Renguang Ye , Shiqing Xu , Hongping Ma

{"title":"Unique strategy for achieving excellent luminous efficiency and high saturation threshold for high-power Laser–Driven lighting","authors":"Zhanhao Fan , Mingwei Fu , Peng Qiao , Youjie Hua , Feifei Huang , Renguang Ye , Shiqing Xu , Hongping Ma","doi":"10.1016/j.jlumin.2024.121040","DOIUrl":"10.1016/j.jlumin.2024.121040","url":null,"abstract":"<div><div>Laser-driven lighting offers high brightness and excellent directivity and is widely employed in laser projection and automobile headlights. However, the phosphor conversion materials currently used in laser-driven lighting suffer from low light-extraction efficiency and poor thermal conductivity. Herein, a unique phosphor-in-glass(PiG)–silver (Ag)–copper (Cu) (referred to as PAC) converter that comprises a four-layer structure is reported: high-doped phosphor-in-glass (PiG) layer, high-reflectivity silver film, sealing silver paste, and copper substrate. Due to its unique design, the sample with an 85 wt% doping concentration and a 0.2 mm thickness exhibits outstanding luminescent performance, achieving a LE of 298 lm W−1 and a luminous flux (LF) of 2873 lm at an input power of 11.54 W. Furthermore, in the rotational mode, a high LF of 3920 lm is achieved. These results demonstrate that the PAC converter holds promise for applications in high-power laser lighting.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"279 ","pages":"Article 121040"},"PeriodicalIF":3.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phosphorescence dynamic behavior of metalloporphyrins in methanol-dimethyl sulfoxide liquid mixtures

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-12-19 DOI: 10.1016/j.jlumin.2024.121039

Lu Li , Feng Qin , Yongda Wang , Lixin Peng , Meng Kou , Zhiguo Zhang , Tao Jia

{"title":"Phosphorescence dynamic behavior of metalloporphyrins in methanol-dimethyl sulfoxide liquid mixtures","authors":"Lu Li , Feng Qin , Yongda Wang , Lixin Peng , Meng Kou , Zhiguo Zhang , Tao Jia","doi":"10.1016/j.jlumin.2024.121039","DOIUrl":"10.1016/j.jlumin.2024.121039","url":null,"abstract":"<div><div>Metalloporphyrins with room-temperature phosphorescence (RTP) demonstrate great potential in information security and optoelectronic devices. However, the effects of different proportions of alcohols and binary mixtures on phosphorescence remain unclear, owing to varying nonradiative transition rate (knP) across different solvents. In this study, we investigated the phosphorescence behavior of Platinum(II) meso-tetraphenylporphyrin (Pt-TPP) in different proportions of methanol-dimethyl sulfoxide (DMSO) liquid mixtures. The changes in the phosphorescence characteristics of Pt-TPP in solvents with varying ratios of methanol and DMSO were assessed through photoluminescence and time-resolved spectroscopy, and the observed variation in phosphorescence was attributed exclusively to knp. The increase of knp is attributed to the gradual narrowing of the energy gap between the excited triplet state of Pt-TPP and the energy levels of the two-component mixed solvent, and knp follows a mono-exponential trend with the energy gap. A linear relationship between the energy gap and the solvent composition was then established by analyzing the absorption spectra of mixtures with varying solvent proportions. Furthermore, a model was proposed to explain that knp exhibits a nonlinear dependence on solvent concentration, as well as the solvent-induced variations in phosphorescence.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"279 ","pages":"Article 121039"},"PeriodicalIF":3.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AIE-active D-A-D(D′) dicyanodiaryl ethylene derivatives: solvatochromism, aggregation-induced emission and high-contrast mechanofluorochromism

IF 3.3 3区物理与天体物理

Journal of Luminescence Pub Date : 2024-12-18 DOI: 10.1016/j.jlumin.2024.121034

Hanrong Liu , Huizhuan Zhu , Baobei Liu , Jiakun Bai , Jiang Peng , Huijuan Zhang , Junhui Jia

{"title":"AIE-active D-A-D(D′) dicyanodiaryl ethylene derivatives: solvatochromism, aggregation-induced emission and high-contrast mechanofluorochromism","authors":"Hanrong Liu , Huizhuan Zhu , Baobei Liu , Jiakun Bai , Jiang Peng , Huijuan Zhang , Junhui Jia","doi":"10.1016/j.jlumin.2024.121034","DOIUrl":"10.1016/j.jlumin.2024.121034","url":null,"abstract":"<div><div>Two AIE-active dicyanodiaryl ethylene derivatives (E)-2-(1,3-bis(4-(diphenylamino)phenyl)allylidene)malononitrile (DPAM) and (E)-2-(3-(4-(diphenylamino)phenyl)-1-(4-(1,2,2-triphenylvinyl)phenyl)allylidene)malononitrile (DPTPAM) based on triphenylamine or tetraphenylethylene have been synthesized and characterized. Photophysical property studies and theoretical calculation results indicated that they have non-planar highly distorted conformations, D-A-D(D′) type molecular structures, and well-defined intramolecular charge transfer (ICT) properties. Furthermore, both molecules, DPAM and DPTPAM, demonstrated interesting aggregation-induced emission (AIE) characteristics in a mixed system comprising THF and water. Additionally, it was observed that both DPAM and DPTPAM were sensitive to external forces with considerable alteration of luminescence colors and intensities. Upon grinding, the maximum emission of DPAM and DPTPAM exhibited a red shift of 49 nm and 70 nm, respectively. Reversible mechanofluorochromism originated from the crystalline-amorphous phase transition in the solid states, which was supported by powder X-ray diffraction experiments (PXRD), differential scanning calorimetry (DSC) and field emission scanning electron microscopy (FESEM) results. The crystal structure analysis further explained that four specific hydrogen bond interactions could be easily disrupted toward to mechanical forces. The planarization of the molecular conformation and subsequent planar intramolecular charge transfer (PICT) could be responsible for the red-shift of fluorescence spectra upon grinding.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"279 ","pages":"Article 121034"},"PeriodicalIF":3.3,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0