Mechanofluorochromism and self-recovery of alkylsilylpyrene-1-carboxamides

Hirai, Yuichi; Wrona-Piotrowicz, Anna; Zakrzewski, Janusz; Ciechańska, Magdalena; Ohmura, Takahito; Takeda, Takashi; Nakanishi, Takayuki; Métivier, Rémi; Allain, Clémence

doi:10.1039/d3tc03968d

Cited by 2 publications

(4 citation statements)

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“…(b) MRL and mechanical properties of boron complexes (reproduced with permission from ref , copyright 2013 John Wiley & Sons, Inc., and ref , copyright 2015 IUCr Journals). (c) MRL response, intermolecular interactions, mechanical parameters, and crystal void volumes of pyrene derivatives (reproduced with permission from ref , copyright 2024 The Royal Society of Chemistry).…”

Section: Sense Deform and Healsupporting

confidence: 56%

“…The chromic direction upon grinding was influenced by packing motifs (Section 3.1), while spontaneous molecular rearrangement was delineated by the nanomechanical constants, rendering the distribution pattern and magnitude of intermolecular interactions and the volume of the crystal voids. 139 Thus, mechanical parameters are essential for understanding the stiffness, deformability, and reversibility of deformation of a material, among other factors. However, since Ramamurty et al provided an overview of NI techniques for molecular crystals in 2013, describing MRL and ML as "stressinduced phenomena that are largely unexplored", 198 only a few studies have reported a comprehensive set of data to date.…”

Section: Quantity Of Deformationmentioning

confidence: 99%

“…Inset shows a big group of gold(I) complexes (reproduced from ref , copyright 2016 American Chemical Society). (Others: FOEB, TPE- p NH 2 , p CN-TPA, TPPA-BQ, Me 3 /Me 2 Et/Et 3 , DTBT, FCO-CzS, C6TPPY, 1R, cis -ABPX01, BF 2 AVB, MTBA, [ZnL 2 ], and ANT-AuCNPh).…”

Section: Sense Deform and Healmentioning

confidence: 99%

“…Recently, we demonstrated the correlation between the MRL-recovery kinetics of Py-derived carboxamides with alkylsilyl groups (Me 3 , Me 2 Et, and Et 3 , respectively, Figure and c) and their deformation types, characterized by the elasticity index and geometric mean ( EH –1 and ( EH ) 1/2 , respectively). The chromic direction upon grinding was influenced by packing motifs (Section ), while spontaneous molecular rearrangement was delineated by the nanomechanical constants, rendering the distribution pattern and magnitude of intermolecular interactions and the volume of the crystal voids . Thus, mechanical parameters are essential for understanding the stiffness, deformability, and reversibility of deformation of a material, among other factors.…”

Section: Sense Deform and Healmentioning

confidence: 99%

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On Sense and Deform: Molecular Luminescence for Mechanoscience

Hirai

2024

ACS Appl. Opt. Mater.

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Mechanoscientific research fields encompassing chemistry, physics, and biology have advanced significantly over the last two decades. Notably, the study of photon-emitting phenomena in molecular solids responsive to mechanical stimulation is known as mechanoresponsive luminescence (MRL) and mechanoluminescence (ML). These phenomena exhibit significant potential for applications such as sensor technology and anti-counterfeiting measures. The versatility observed in molecular designs, enabling control over responsive thresholds and wavelengths, coupled with diverse mechanisms for inducing deformation, such as heat, light, and sound, significantly broadens the domain of mechanically sensitive molecular materials. However, the understanding of the nanomechanical aspects about these molecular solids remains elusive. A comprehensive examination of the interplay among molecular structures, deformation characteristics, and luminescence responses is essential for further exploration. Such insights are crucial for addressing the intrinsic limitation of “one-time use” associated with deformation-induced properties, necessitating a focus on solid-state healing processes as well. Recent investigations into inorganic-based ML systems applied to free-standing light sources and mechanical metamaterial design foreshadow the future trajectory of molecular-based systems. These advancements aim to facilitate the secondary use of generated photons and the efficient capture/transfer of mechanical cues, enhancing optical output. Molecular luminescence stands poised to make substantial contributions to the ongoing rapid progress in mechanoscience due to an expanding synthetic repertoire, heightened biocompatibility, and precise “structural control” at molecular and macroscopic scales.

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Section: Sense Deform and Healsupporting

confidence: 56%

Section: Quantity Of Deformationmentioning

confidence: 99%