Encapsulation of multi-stimuli AIE active platinum(<scp>ii</scp>) complex: a facile and dry approach for luminescent mesoporous silica

Pasha, Sheik Saleem; Alam, Parvej; Sarmah, Amrit; Roy, Ram Kinkar; Laskar, Inamur Rahaman

doi:10.1039/c6ra17273c

Cited by 21 publications

(12 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 2001, Tang et al discovered the very different light-emitting behaviors of some silole derivatives in solution and solid states. Weak or nonemissive in dilute solution but highly luminescent when their molecules aggregate in concentrated solutions or solid state, which has been defined as aggregation-induced emission (AIE). − This discovery offers exciting inspirations to design and synthesize Pt II complexes with high EL performance, changing the emission behavior from ACQ to AIE. − To date, some Pt II complexes with AIE character have been reported. ,− Huang’s group has established a series of ppy-type AIE-active Pt II complexes for bioimaging applications . Liu et al reported a series of Pt II diimine acetylide complexes with good AIE nature and optical power limiting property .…”

Section: Introductionmentioning

confidence: 99%

“…Yam’s group developed two unsymmetric bipyridine–Pt II –alkynyl complexes with AIE nature, which have been employed in OLED application showing maximal η L of 18.4 cd A –1 and η ext of 5.8% . After replacing the β-diketonato ancillary ligand of Pt II (C^N)acac with one chloride and N-donor ligand, AIE-active heteroleptic Pt II (C^N)(N-donor ligand)Cl complexes can be obtained, , which have been employed to investigate their structural features, biological activity, ,, and catalytic performance, etc. To the best of our knowledge, the EL studies of the Pt II complexes with AIE character are still of shortage.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cyclometalated Platinum Complexes with Aggregation-Induced Phosphorescence Emission Behavior and Highly Efficient Electroluminescent Ability

Zhao

Zhong

et al. 2018

Chem. Mater.

View full text Add to dashboard Cite

Aggregation-induced emission (AIE) materials can exhibit intense luminescence in the aggregated or solid state, which are highly desirable for OLED application. However, only limited research results on developing AIE-active PtII complexes in electroluminescence (EL) application have been reported so far. Herein, a series of AIE-active PtII(C^N)(N-donor ligand)Cl complexes have been developed. Their chemical structures have been determined by NMR, MS, and X-ray crystallography characterization. Theoretical results including the frontier molecular orbitals, the simulated UV–vis spectra, and natural transition orbitals (NTO) have been employed to insightfully interpret their photophysical properties. It has also been found that a much higher degree of molecular aggregation in these PtII complexes should be required to induce phosphorescent AIE than that for the fluorescent AIE behavior. These AIE-active PtII complexes can exhibit very strong emission in poly(methyl methacrylate) (PMMA) films with the phosphorescence quantum yield (Φp) of ∼72.0%, while that in dilute solution is just about 4.7%. Accordingly, on the basis of these AIE-active PtII complexes, the optimized OLEDs fabricated by the simple solution-processed strategy can achieve high EL efficiencies with a maximal external efficiency (ηext) of 28.4%, a maximal current efficiency (ηL) of 75.9 cd A–1, and a maximal power efficiency (ηP) of 62.7 lm W–1. Considering the rarity for EL investigations of the AIE-active PtII complexes, the concerned results realized by these PtII(C^N)(N-donor ligand)Cl complexes should provide valuable clues for exploring AIE-active PtII phosphorescent complexes with high EL performance.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cyclometalated Platinum Complexes with Aggregation-Induced Phosphorescence Emission Behavior and Highly Efficient Electroluminescent Ability

Zhao

Zhong

et al. 2018

Chem. Mater.

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7] Unlikeo ther wellknown octahedral phosphorescent d 6 Ru II [8,9] and Ir III [10,11] complexes, d 8 Pt II complexes, with as quare-planar geometry, are far more likely to encounter the problem of emission "aggregation-caused quenching" (ACQ), [12,13] because they facilely form dimers through not only intermolecular p-p stacking interactions, but also Pt II -Pt II interactions. [1][2][3][4][5][6][7] Therefore, al ot of efforts have been made to develop aggregation-induced emission (AIE) [14,15] or phosphorescence (AIP) [16] -active Pt II complexes with bidentate [17][18][19][20] andt ridentate [21][22][23] ligands recently.H owever,t ot he best of our knowledge,A IP-active Pt II complexes with p-conjugated tetradentatel igandsa re still rare. The reported phosphorescent tetradentate porphyrin [24][25][26] and Salenbased [27][28][29][30][31] Pt II complexesu sually show ACQ rather than AIE.…”

mentioning

confidence: 99%

Unusual Circularly Polarized and Aggregation‐Induced Near‐Infrared Phosphorescence of Helical Platinum(II) Complexes with Tetradentate Salen Ligands

Song

Wang

Zhou

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

A series of chiral and helical Pt -Salen complexes with 1,1'-binaphthyl linkers were synthesized and characterized. Owing to the restriction of intramolecular motions of central 1,1'-binaphthyls, the complexes exhibit unusual near-infrared aggregation-induced phosphorescence (AIP). The (R)/(S) enantiopure complexes were characterized by X-ray diffraction, circular dichroism spectra, time-dependent density functional theory calculations, and circularly polarized luminescence (CPL). The present work explores the use of tetradentate ligands that can be easily prepared from commercially available enantiopure compounds, and the subsequent preparation of stable CPL-active square planar Pt complexes with AIP effect that may have interest in many applications.

show abstract

“…These molecules were successfully loaded into the pores of MSNs during this facile and dry synthetic approach. [ 91 ]…”

Section: Fabrication Methodologymentioning

confidence: 99%

Frontier luminous strategy of functional silica nanohybrids in sensing and bioimaging: From ACQ to AIE

Jiang

Liang

et al. 2021

Aggregate

View full text Add to dashboard Cite

Fluorescent silica organic–inorganic nanohybrids which combine designable luminescence performance of organic fluorescent dyes and various outstanding advantages of silica nanomaterials have attracted increasing research interests in these fascinating areas. Optical transparency and facile functional modification properties of silica material provide great opportunities to integrate desired fluorescent molecules for various frontier luminous applications. However, conventional organic dyes are typically subject to aggregation‐caused quenching due to their aggregation in silica matrix, which could be detrimental for their performance in sensing and biomedical applications. The appearance of aggregation‐induced emission luminogens (AIEgens) paves a new way for developing highly efficient fluorescent silica nanohybrids (FSNs). FSNs with intensive luminescence could be obtained due to the formation of aggregates and the restricted intramolecular motion of AIEgens in silica inorganic matrix. In this review, the reported fabrication methodologies of various FSNs based on colloidal silica nanoparticles (SNs) and mesoporous SNs including physical entrapment and covalent strategies are summarized. Especially, the AIEgens‐functionalized silica hybrid nanomaterials are introduced in detail. Furthermore, chemical sensing, biosensing, and bioimaging applications of resultant FSNs are also discussed.

show abstract

Encapsulation of multi-stimuli AIE active platinum(ii) complex: a facile and dry approach for luminescent mesoporous silica

Abstract: We report the dissociation of a yellow emitting excimeric and AIE active Pt(ii) complex into the green emitting monomeric form after crushing with mesoporous silica (MS) followed by its encapsulation within the pores of MS.

Cited by 21 publications

References 34 publications

Cyclometalated Platinum Complexes with Aggregation-Induced Phosphorescence Emission Behavior and Highly Efficient Electroluminescent Ability

Cyclometalated Platinum Complexes with Aggregation-Induced Phosphorescence Emission Behavior and Highly Efficient Electroluminescent Ability

Unusual Circularly Polarized and Aggregation‐Induced Near‐Infrared Phosphorescence of Helical Platinum(II) Complexes with Tetradentate Salen Ligands

Frontier luminous strategy of functional silica nanohybrids in sensing and bioimaging: From ACQ to AIE

Contact Info

Product

Resources

About