Circularly‐Polarized Electrochemiluminescence from a Chiral Bispyrene Organic Macrocycle

Zinna, Francesco; Voci, Silvia; Arrico, Lorenzo; Brun, Elodie; Homberg, Alexandre; Bouffier, Laurent; Funaioli, Tiziana; Lacour, Jérôme; Šojić, Nešo; Bari, Lorenzo Di

doi:10.1002/ange.201901303

Cited by 40 publications

(16 citation statements)

References 52 publications

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“…Circularly polarized luminescence (CPL) is a unique chiroptical property of chiral emission systems and is regarded as one of the most important tools for investigating the excited‐state properties of chiral materials . Materials exhibiting CPL are of great interest not only for understanding the mystery of chirality but also for potential important applications, such as chiroptical recognition sensors, noninvasive biomedical diagnosis in the biological field, and catalysts for asymmetric chemical synthesis …”

Section: Figurementioning

confidence: 99%

Finely Controlled Circularly Polarized Luminescence of a Mechano‐Responsive Supramolecular Polymer

et al. 2019

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Finely controlled circularly polarized luminescence (CPL) supramolecular polymerization based on a tetraphenylethene core with four l‐ or d‐alanine branch side chains (l‐1 and d‐1) in the solution state is presented, resulting from the tuning of mechanical stimulus. Weak, green emissions of l‐1 and d‐1 in tetrahydrofuran (THF) were converted into strong blue emissions by tuning the mechanical stimulus. The strong blue emissions were caused by an aggregation‐induced emission (AIE) effect during the formation of a supramolecular polymer. Lag time in the supramolecular polymerization was drastically reduced by the mechanical stimulus, which was indicative of the acceleration of the supramolecular polymerization. A significant enhancement of circular dichroism (CD) and CPL signals of l‐1 and d‐1 was observed by tuning the rotational speed of the mechanical stimulus, implying that the chiral supramolecular polymerization was accelerated by the mechanical stimulus.

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Section: Figurementioning

confidence: 99%

Finely Controlled Circularly Polarized Luminescence of a Mechano‐Responsive Supramolecular Polymer

et al. 2019

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“…This feature indeed has stimulated research focus on ECL‐based microscopy for imaging of sensing‐array, latent fingermarks, single micro‐/nanoentities, proteins on the cell membrane and subcellular structures . In addition, a lot of novel ECL‐related concepts and techniques have also been developed more recently, such as self‐enhanced ECL, potential‐resolved multicolor ECL, aggregation‐induced ECL (AIECL), surface plasmon resonance modulated ECL, photoinduced ECL and circularly‐polarized ECL . In this work we report the first observation of ECL waveguide (ECLW) in single crystalline molecular wires of tris(1‐phenylisoqsuinoline‐ C 2 , N )iridium (III) (Ir(piq) 3 ).…”

Section: Methodsmentioning

confidence: 97%

Electrochemiluminescence Waveguide in Single Crystalline Molecular Wires

et al. 2020

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Here we report the first observation of active waveguide of electrochemiluminescence (ECL) in single crystalline molecular wires self‐assembled from cyclometalated iridium(III) complexes, namely tris(1‐phenylisoquinoline‐C2, N) (Ir(piq)3). Under dark conditions, the molecular wires deposited on the electrode surface can act as both ECL emitters and active waveguides. As revealed by ECL microscopy, they exhibit the typical characteristics of optical waveguides, transmitting ECL and generating much brighter ECL emission at their terminals. Moreover, self‐generated ECL can be confined inside the molecular wire and propagates along the longitudinal direction as far as ≈100 μm to the terminal out of touch with the electrode. Therefore, this one‐dimensional crystalline molecular wire‐based waveguide offers the opportunity to switch the electrochemically generated ECL to remote light emission in non‐conductive regions and is promising for contactless electrochemical analysis and study of (bio)chemical systems.

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“…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

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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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Circularly‐Polarized Electrochemiluminescence from a Chiral Bispyrene Organic Macrocycle

Cited by 40 publications

References 52 publications

Finely Controlled Circularly Polarized Luminescence of a Mechano‐Responsive Supramolecular Polymer

Finely Controlled Circularly Polarized Luminescence of a Mechano‐Responsive Supramolecular Polymer

Electrochemiluminescence Waveguide in Single Crystalline Molecular Wires

Lighting up Electrochemiluminescent Inactive Dyes by Intramolecular Resonance Energy Transfer

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