Electrochemiluminescence of cyclometalated iridium (III) complexes

Haghighatbin, Mohammad A.; Laird, Sarah E.; Hogan, Conor F.

doi:10.1016/j.coelec.2018.03.026

“…For diagnostics and biomedical applications, the luminophore must also possess a good degree of solubility in aqueous media where biological analyses are usually performed. Keeping into account also the role of the spin statistics in the formation of the exciton [14], the use of phosphorescent emitters have been found to outperform fluorescent dyes, resulting in the field being dominated by transition metal complexes, in particular ruthenium and iridium complexes [15][16][17][18][19][20][21]. Unfortunately, phosphorescent compounds possess relatively low photoluminescence quantum yield (PLQY), especially in aerated conditions as elemental oxygen is an effective quencher of the long-lived excited triplet state.…”

Section: Aggregation-induced Electrochemiluminescencementioning

confidence: 99%

Aggregation-Induced Emission in Electrochemiluminescence: Advances and Perspectives

Moreno‐Alcántar

¹

,

Aliprandi

²

,

Cola

³

2021

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The discovery of aggregation-induced electrochemiluminescence (AIECL) in 2017 opened new research paths in the quest for novel, more efficient emitters and platforms for biological and environmental sensing applications. The great abundance of fluorophores presenting aggregation-induced emission in aqueous media renders AIECL a potentially powerful tool for future diagnostics. In the short time following this discovery, many scientists have found the phenomenon interesting, with research findings contributing to advances in the comprehension of the processes involved and in attempts to design new sensing platforms. Herein, we explore these advances and reflect on the future directions to take for the development of sensing devices based on AIECL. Graphic abstract

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“…For diagnostics and biomedical applications, the luminophore must also possess a good degree of solubility in aqueous media where biological analyses are usually performed. Keeping into account also the role of the spin statistics in the formation of the exciton [14], the use of phosphorescent emitters have been found to outperform fluorescent dyes, resulting in the field being dominated by transition metal complexes, in particular ruthenium and iridium complexes [15][16][17][18][19][20][21]. Unfortunately, phosphorescent compounds possess relatively low photoluminescence quantum yield (PLQY), especially in aerated conditions as elemental oxygen is an effective quencher of the long-lived excited triplet state.…”

Section: Aggregation-induced Electrochemiluminescencementioning

confidence: 99%

Aggregation-Induced Emission in Electrochemiluminescence: Advances and Perspectives

Moreno‐Alcántar

¹

,

Aliprandi

²

,

Cola

³

2021

Topics in Current Chemistry Collections

2

0

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The discovery of aggregation-induced electrochemiluminescence (AIECL) in 2017 opened new research paths in the quest for novel, more efficient emitters and platforms for biological and environmental sensing applications. The great abundance of fluorophores presenting aggregation-induced emission in aqueous media renders AIECL a potentially powerful tool for future diagnostics. In the short time following this discovery, many scientists have found the phenomenon interesting, with research findings contributing to advances in the comprehension of the processes involved and in attempts to design new sensing platforms. Herein, we explore these advances and reflect on the future directions to take for the development of sensing devices based on AIECL.

show abstract

“…Current available ECL emitters mainly include metal complexes, [10][11][12] semiconducting nanoparticles/nanoclusters, [13][14][15][16] conjugated organic molecules [17][18][19] . Great efforts of modulating electron transfer among electrode, emitters and/or co-reactants by potential control, [20][21][22][23][24] aggregation-induction, [25][26][27][28][29] self-enhancement, [30][31][32][33][34] crystallization, [35][36][37][38] as well as other strategies, [39][40][41][42] have been devoted to improving ECL efficiency and adapting to different application schemes.…”

Section: Introductionmentioning

confidence: 99%

Lighting up Electrochemiluminescent Inactive Dyes by Intramolecular Resonance Energy Transfer

Zheng¹,

Yang²,

Zhao³

et al. 2021

Preprint

0

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By virtue of near-zero optical background and photobleaching, electrochemiluminescence (ECL), an optical phenomenon excited by electrochemical reactions, has drawn extensive attention in both fundamental studies and wide applications especially of ultrasensitive bioassay. Developing diverse ECL emitters is crucial to unlock their multiformity and performances, but remains a formidable challenge, due to the rigorous requirements for ECL. Herein, we report a general intramolecular ECL resonance energy transfer (iECL-RET) strategy to light up ECL-inactive dyes in aqueous solutions using an existing high-performance ECL initiators. As a proof-of-concept, a series of luminol donor-dye acceptor based ECL emitters with near unity RET efficiency and coarse/fine tunable emission wavelengths were demonstrated. Different to previous exploitation of new molecule single-handedly to address all the prerequisites of ECL, each unit in the proposed ECL ensemble performed maximally its own functions. The iECL-RET strategy would greatly expand the family members of ECL emitters for more demanding future applications.

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Electrochemiluminescence of cyclometalated iridium (III) complexes

Cited by 46 publications

References 31 publications

Aggregation-Induced Emission in Electrochemiluminescence: Advances and Perspectives

Aggregation-Induced Emission in Electrochemiluminescence: Advances and Perspectives

Aggregation-Induced Emission in Electrochemiluminescence: Advances and Perspectives

Lighting up Electrochemiluminescent Inactive Dyes by Intramolecular Resonance Energy Transfer

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