Organic Room-Temperature Phosphorescent Materials: From Static to Dynamic

Gu, Long; Wang, Xiao; Singh, Manjeet; Shi, Huifang; Ma, Huili; An, Zhongfu; Huang, Wei

doi:10.1021/acs.jpclett.9b03363

Cited by 82 publications

(67 citation statements)

References 53 publications

(85 reference statements)

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“…The successful linking of CzC2OH by silicon was verified by the up-field proton chemical shifts, as well as the disappearance of hydroxyl hydrogen at 4.90 ppm (Supporting Information Scheme S3). 1 H and 13 C NMR spectroscopy, HR-MS, and single-crystal X-ray diffraction (XRD) confirmed their structures with high purity (see Supporting Information for details). DCzSi, in which carbazoles were directly connected with silicon, was also synthesized for comparison as shown in Supporting Information Scheme S2.…”

Section: Resultsmentioning

confidence: 81%

“…Adjustable movements can be triggered to reduce channel sizes for inhibiting the molecular vibrations and oxygen quenching, then promote the occurrence of ultralong RTP. 13,46,49,50 Indeed, DCzC2OSi crystals displayed persistent yellow RTP with lifetime as 924.8 ms in air after being irradiated by 365 nm lamp for 30 s (Figure 4a). The RTP lifetime increasement of DCzC2OSi crystals induced by irradiation could be easily observed upon monitoring excitation durations and excitation light intensities (Figure 4b, Supporting Information Figures S13 and S14).…”

Section: Resultsmentioning

confidence: 99%

“…2,[8][9][10][11] Particularly, pure organic materials are highly desirable for oxygen detection due to their long-lived room temperature phosphorescence (RTP), low-cost, large Stokes shift and good processibility. [12][13][14][15] In general, achieving pure organic ultralong RTP should consider two design principles: 1) promotion of intersystem crossing (ISC) through incorporating halogen atoms, [16][17][18][19] heteroatoms [20][21][22] , or aromatic carbonyl groups [23][24][25] ; 2) suppression of rapid non-radiative transition of triplet excited state to ground state by crystallization 24,[26][27][28][29][30] , host-guest interaction 31,32 , polymer-matrix assistance 33,34 etc. Crystal engineering is the most widely employed method to achieve pure organic room temperature phosphorescence, owing to the tightly packing of molecules to suppress non-radiative decays from molecular motions by a number of halogen bonds, hydrogen bonds and intermolecular π─π interactions in crystals.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ultralong Room-Temperature Phosphorescence of Silicon-Based Pure Organic Crystal for Oxygen Sensing

et al. 2022

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Quantitative oxygen detection is of great importance in biological fields, complex environments and chemical process engineering. Due to the high sensitivity and fast response of long-lived phosphorescence to oxygen, pure organic room temperature phosphorescence (RTP) for oxygen detection has recently attracted much interests. However, to simultaneously achieve ultralong phosphorescence at room temperature and quantitative oxygen detection from pure organic crystals is difficult because tight packing for restricting nonradiative decays is not apt to allow oxygen diffusion for sensing. Reported herein is such an exceptional example, i.e. a crystal of simple carbazole molecule bridging with an ethoxysilane (DCzC2OSi), is capable of oxygen sensing with remarkable sensitivity. Photophysical studies and single crystal structure analysis reveal that DCzC2OSi crystals display ultralong RTP and suitable oxygen diffusion channels from the butterfly-like tetrahedron geometry. Further comparisons with the crystals of CzC2OH and DCzSi verify the important roles of silicon and ethoxy groups of DCzC2OSi for both enhanced phosphorescence lifetime and oxygen sensitivity.When the crystals of DCzC2OSi were doped into polymer, the lifetime-based oxygen sensor exhibits high K SV (5.308 kPa -1 ) with full reversibility, which would be attractive to the future development of practical oxygen sensors from pure organic crystals.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultralong Room-Temperature Phosphorescence of Silicon-Based Pure Organic Crystal for Oxygen Sensing

et al. 2022

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“…Nevertheless, the synthesis of new chromophores and long-lived polymer RTP materials is still complicated, time-consuming, and expensive. Furthermore, most of the RTP materials are static, and the long-lived polymer RTP systems with a dynamic stimulus-responsive behavior have been rarely reported [29][30][31][32][33][34][35]. Compared with static RTP materials, dynamic stimulusresponsive RTP systems have more application prospects in the fields of sensing, as well as information anticounterfeiting and encryption.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet-activated long-lived room-temperature phosphorescence from small organic molecule-doped polymer systems

Wang

Zheng

et al. 2021

Sci. China Mater.

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Long-lived organic room-temperature phosphorescent (RTP) materials have attracted widespread attention because of their fantastic properties and application prospects. The current methods for developing RTP materials are mainly based on the synthesis of new chromophore molecules and crystallization engineering. However, there are great challenges in the preparation of new chromophore molecules and the use of crystalline materials. Herein, dynamic stimulus-responsive long-lived RTP systems with various emission colors are realized by doping organic chromophore molecules into polymer matrix prepared from vinyl acetate and acrylic acid. Through UV light irradiation, the growth process of long-lived RTP phenomena can be observed for up to 10 s. In particular, the phosphorescence intensity, lifetime, afterglow brightness, and quantum yield of one representative film (P2-M2) increase by 155, 262, 414, and 8 times after the irradiation, respectively. The unique photophysical phenomena are ascribed to the oxygen consumption characteristics of the polymer matrix under UV irradiation. Meanwhile, the information storage devices are prepared with these RTP systems. This work provides a strategy for achieving small organic molecule-doped polymer RTP systems that are easy to prepare, low-cost, and widely adaptable.

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“…16,17 These materials could tune their properties and respond to external stimuli, including light, 18 temperature, 19 pressure, 20 magnetic and electric elds 21,22 and so forth. 23,24 Among these stimuluses, light is a most attractive external stimulus as it offers clean and noninvasive control of the operation with high accuracy, showing greater convenience in activating or erasing the secret encoded information with high level of spatiotemporal resolution as compared to other chemical stimuli. 25 For instance, photo-switchable molecules can transfer from one isomeric form to another through reversible photochemical reactions with various optical properties.…”

Section: Introductionmentioning

confidence: 99%

Fast Photo Stimulus Responsive Ultralong Room-temperature Phosphorescence Behaviour of Benzoic Acid Derivatives @ Boric acid

Cheng

Fan

Wang

et al. 2021

Preprint

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Ultralong room-temperature phosphorescence (URTP) materials with photo stimulus responsive (named URTP-PSR) behavior are amazing but still rarely reported due to their great requirements on the crystal structure, complicated synthesis process, long photo-activation and deactivation time. Herein, a series of URTP-PSR materials were prepared by a facile doping process, which involved one-pot heating treatment of benzoic acid derivatives and boric acid to form an amorphous phase. The URTP-PSR materials displayed gradually enhanced ultra-long phosphorescence upon prolonged deep UV light illumination under ambient conditions to restricts the vibration and rotation of molecular. Impressively, both of the photo-activation and deactivation process can be finished within several seconds, which was much fast than previously reported URTP-PSR materials. The optical properties can be repeated many times without obvious loosing performance, suggesting excellent fatigue resistance behaviors of the URTP-PSR materials. Simultaneously, the URTP-PSR materials also displayed excellent atmosphere stability, which still maintained good optical properties even under oxygen atmosphere. Furthermore, owing to the high processability and light-stimulus emission, the URTP-PSR materials have been utilized as security ink for anti-counterfeiting pattern application. It's worth mentioning that all the raw materials are commercialized and low-cost, which could be purchased directly and benefit for the practical application. These findings break through many limitations of existing dynamic RTP materials, such as complicated preparation process, fine crystal structure, long photo-activation and deactivation time, and furthermore expand the scope of dynamic smart-response materials for great potential in many fields.

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Organic Room-Temperature Phosphorescent Materials: From Static to Dynamic

Cited by 82 publications

References 53 publications

Ultralong Room-Temperature Phosphorescence of Silicon-Based Pure Organic Crystal for Oxygen Sensing

Ultralong Room-Temperature Phosphorescence of Silicon-Based Pure Organic Crystal for Oxygen Sensing

Ultraviolet-activated long-lived room-temperature phosphorescence from small organic molecule-doped polymer systems

Fast Photo Stimulus Responsive Ultralong Room-temperature Phosphorescence Behaviour of Benzoic Acid Derivatives @ Boric acid

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