Exploring highly efficient light conversion agents for agricultural film based on aggregation induced emission effects

Qi, Yunpeng; Wang, Yongtao; Yu, Yiping; Li, Yong; Zhang, Yan; Qi, Yu; Zhou, Changjian

doi:10.1039/c6tc04215e

Cited by 52 publications

(26 citation statements)

References 61 publications

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“…For instance, someb iomedical applications, such as biosensing, bioimaging, [14][15][16][17][18][19] and gene and drug delivery, [2,20,21] are based on molecular self-assembled systems. In addition, the crystal packing adopted by p-conjugatedc ompounds determines their electronic andp hotophysicalp roperties and their later use in light-emitting electronic devices, [1,14,15] chemiresistives ensors, [15,22] agricultural films, [23] among others.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Driving Mechanisms of Enhanced Luminescence Emission of Oligo(styryl)benzenes and Tri(styryl)‐s‐triazine

Domínguez

Moral

Fernández‐Liencres

et al. 2020

Chemistry A European J

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This work is focused on unraveling the mechanisms responsible for the aggregation‐induced enhanced emission and solid‐state luminescence enhancement effects observed in star‐shaped molecules based on 1,3,5‐tris(styryl)benzene and tri(styryl)‐s‐triazine cores. To achieve this, the photophysical properties of this set of molecules were analyzed in three states: free molecules, molecular aggregates in solution, and the solid state. Different spectroscopy and microscopy experiments and DFT calculations were conducted to scrutinize the causative mechanisms of the luminescence enhancement phenomenon observed in some experimental conditions. Enhanced luminescence emission was interpreted in the context of short‐ and long‐range excitonic coupling mechanisms and the restriction of intramolecular vibrations. Additionally, we found that the formation of π‐stacking aggregates could block E/Z photoisomerization through torsional motions between phenylene rings in the excited state, and hence, enhancing the luminescence of the system.

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Section: Introductionmentioning

confidence: 99%

Understanding the Driving Mechanisms of Enhanced Luminescence Emission of Oligo(styryl)benzenes and Tri(styryl)‐s‐triazine

Domínguez

Moral

Fernández‐Liencres

et al. 2020

Chemistry A European J

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“…Not only does the membrane retain the semitransparency of ordinary plastic membranes, but it also converts most of the sun's ultraviolet rays into red or blue, which is able to promote plant growth. At present, most commonly used light conversion agricultural films are made of PE and PVC . The types of light conversion agent include organic dyes, metal sulfides, metal nitrides, and rare earth complexes …”

Section: Introductionmentioning

confidence: 99%

“…At present, most commonly used light conversion agricultural films are made of PE and PVC. 18 The types of light conversion agent include organic dyes, metal sulfides, metal nitrides, and rare earth complexes. [19][20][21][22] Luminescence from the rare earth element (RE 3+ ) originates from transitions between 4f orbitals, while these movements are not allowed on symmetry grounds, which are (4f n ) well isolated by 5S 2 and 5P orbitals.…”

Section: Introductionmentioning

confidence: 99%

Polylactide/poly(butylene adipate‐co‐terephthalate)/rare earth complexes as biodegradable light conversion agricultural films

Wang

et al. 2018

Polymers for Advanced Techs

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Rare earth europium(III) complex with α‐thenoyltrifluoroacetone and triphenylphosphine oxide (Eu (TTA)3(TPPO)2, shortened as EuTT) was synthesized in this paper, then blended with polylactide (PLA) and poly(butylene adipate‐co‐terephthalate) (PBAT) to prepare the biodegradable agricultural films. Through the optical performance, mechanical properties, and other research, the results showed that the rare earth complex could convert the sun's ultraviolet light to red light when doped polymer. Moreover, the relative intensity ratio of 5D0/7F2 to 5D0/7F1 of PLA/PBAT/EuTT film could reach 3.79, which implied that the film had strong fluorescence intensity and high color purity. The highest tensile strength of the film could reach 36.7/25.2 MPa, and the elongation at break was 462.8/483.0% in the machine and in the transverse direction when the added amount of Eu (TTA)3(TPPO)2 was 0.1 wt%. The tensile strength of the film was 33.3/20.1 MPa, and the elongation at break could reach 535.8/413.6% when the added amount of Eu (TTA)3(TPPO)2 was increased up to 0.3 wt%. Gel permeation chromatography showed that the Eu (TTA)3(TPPO)2 could cause depolymerization of polylactide, resulting in a decrease in the molecular weight of PLA. Furthermore, the crystallization ability of PLA was also improved. In this paper, the biodegradable films exhibited excellent ultraviolet light conversion ability and mechanical properties.

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“…In addition, a palladium-catalysed oxidative alkoxycarbonylation with carbon monoxide in MeOH allowed the construction of a fully substituted α,β-unsaturated ester 13 63 . Finally, a phenanthrene product (14) was obtained via a Suzuki-Miyaura coupling/oxidative cyclization cascade 64 .…”

Section: Synthesis Of Tetraarylethenesmentioning

confidence: 99%

Regio- and stereoselective synthesis of tetra- and triarylethenes by N-methylimidodiacetyl boron-directed palladium-catalysed three-component coupling

Lin

Schäfers

et al. 2019

Commun Chem

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The flexible synthesis of tetra-and triarylethenes bearing different aryl groups has been a long-standing challenge in organic synthesis. Here we report a palladium-catalysed syndiarylation of arylethynyl N-methyliminodiacetyl (MIDA) boronates. The products, triarylalkenyl N-methyliminodiacetyl boronates, allow a step-economic and modular synthesis of tetra-or triarylethenes via a subsequent stereospecific Suzuki-Miyaura coupling reaction or base-promoted protodeborylation, respectively. Use of the sp 3-B(MIDA) masked aryl alkyne is the key factor for success by offering an exceptionally good regioselectivity for the boronretentive coupling. The unusual regioselectivity is believed to arise from the stabilization due to the strong electron donation from the C−Pd σ bond to the p-orbital of boron in the transition state of migratory insertion. A broad range of differently substituted tetra-and triarylethenes are constructed in good yields and geometrical control. Synthetic manipulation of the C-B bond also enables the facile construction of several other types of tetra-substituted alkenes.

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Exploring highly efficient light conversion agents for agricultural film based on aggregation induced emission effects

Abstract: Five compounds and their corresponding light conversion films were prepared based on AIE effects and the thermally activated delayed fluorescence (TADF) phenomenon.

Cited by 52 publications

References 61 publications

Understanding the Driving Mechanisms of Enhanced Luminescence Emission of Oligo(styryl)benzenes and Tri(styryl)‐s‐triazine

Understanding the Driving Mechanisms of Enhanced Luminescence Emission of Oligo(styryl)benzenes and Tri(styryl)‐s‐triazine

Polylactide/poly(butylene adipate‐co‐terephthalate)/rare earth complexes as biodegradable light conversion agricultural films

Regio- and stereoselective synthesis of tetra- and triarylethenes by N-methylimidodiacetyl boron-directed palladium-catalysed three-component coupling

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