Light‐Activated Nanoprobes for Biosensing and Imaging

Li, Mengyuan; Zhao, Jian; Chu, Hongqian; Mi, Yongsheng; Zhou, Zehua; Di, Zhenghan; Zhao, Meiping; Li, Lele

doi:10.1002/adma.201804745

Cited by 59 publications

(43 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The field of molecular switches continues to hold great promise in the control of diverse properties and functions in the macroscopic world. [1][2][3][4] Despite over 100 years of study, new applications both in research and materials (not least in light responsive sun glasses) emerge owing to the wide and diverse range of building blocks available. [5][6][7][8][9][10][11][12][13] The known photochromes include a range of switches that have been proven versatile to chemical modification, enabling changes to, enhancement of, and sometimes even completely novel, functionality.…”

Section: Introductionmentioning

confidence: 99%

The evolution of spiropyran: fundamentals and progress of an extraordinarily versatile photochrome

2019

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

The evolution of spiropyran: fundamentals and progress of an extraordinarily versatile photochrome

2019

View full text Add to dashboard Cite

show abstract

“…Light is a clean, noninvasive, and tunable stimulus that allows the properties of molecules and materials to be remotely controlled in a reversible manner with remarkable time and spatial resolution. [ 1–8 ] Of particular interest are luminescent materials that undergo emission modulation upon irradiation, [ 9–12 ] which are exploited in high‐density data storage [ 13,14 ] and information processing, [ 15 ] white light generation, [ 16 ] (bio)sensing and imaging, [ 17–20 ] anticounterfeiting technologies, [ 21,22 ] and photowritable/erasable fluorescent inks, [ 23 ] among other areas. For many of these applications, the use of near‐infrared (NIR) radiation to achieve luminescence modulation would be highly beneficial, e.g., to reach higher penetration depths with lower photodamage for (bio)imaging probes [ 18,24 ] or to develop advanced security inks for anticounterfeiting.…”

Section: Introductionmentioning

confidence: 99%

Solid Materials with Near‐Infrared‐Induced Fluorescence Modulation

Otaegui

Rubirola

Ruiz‐Molina

et al. 2020

Advanced Optical Materials

View full text Add to dashboard Cite

which are exploited in high-density data storage [13,14] and information processing, [15] white light generation, [16] (bio) sensing and imaging, [17-20] anticounterfeiting technologies, [21,22] and photowritable/erasable fluorescent inks, [23] among other areas. For many of these applications, the use of near-infrared (NIR) radiation to achieve luminescence modulation would be highly beneficial, e.g., to reach higher penetration depths with lower photodamage for (bio)imaging probes [18,24] or to develop advanced security inks for anticounterfeiting. [25] Currently, most common methodologies applied to achieve fluorescence modulation are based on the reversible interconversion of photochromic dyes. [9,10,11-18,19-21] However, these systems suffer from important drawbacks that are limiting their application in commercial products. On one hand, the interconversion of photochromic dyes are generally based on isomerization processes that involve large polarity and geometrical changes, which are often detrimentally affected by the surrounding matrix when these compounds are transferred from solution to the solid state. This is especially the case for photoswitchable luminescent materials based on T-type photochromes, [26] for which novel strategies are being developed to favor dye (photo) isomerization in solid matrices (e.g., by covalently attaching bulky moieties to increase the surrounding free volume [22,27] or by using photoisomersable compounds with minimal conformational changes [26,28]). On the other hand, photochromic dyes typically operate under highly energetic UV or visible radiation (e.g., spiropyrans) which contributes significantly to fast dye degradation. [29] Actually, making photochromic compounds sensitive to NIR radiation still remains a challenge that requires intricate synthetic procedures [30-33] and/or multiphoton excitation under high irradiation powers. [34-40] As such, their incorporation into more complex systems to attain NIR-induced luminescence modulation has been largely hampered to date. As an alternative to photochromic-based systems, we report herein a conceptually different strategy to obtain NIR-driven fluorescence modulation in the solid state, which takes advantage of a) the recent discovery by us [41-43] and others [44-47] that the emission of selective dyes dispersed in phase change materials (PCMs) can be thermally varied upon solid-to-liquid Solid molecular materials modulating their luminescent properties upon irradiation are typically based on photochromic dyes. Despite these are potentially interesting for applications such as anticounterfeiting, bioimaging, optical data storage, and writable/erasable devices, key features are preventing their use in marketable products: the lack of straightforward strategies to obtain near infrared (NIR) radiation-responding photochromic dyes and the dramatic response modification these molecules suffer in solids. Herein a photochrome-free approach is reported to achieve solid materials whose luminescence modulation is induced by NIR radi...

show abstract

“…Spontaneous emissions from fluorescent materials have potential applications in solar energy conversion, [ 1 ] biomedical imaging, [ 2 ] biosensing, [ 3 ] and chemical sensing. [ 4 ] Fluorescent emissions occur from the interactions between a fluorescent emitter and its electromagnetic environment through the absorption of short‐wavelength photons re‐emitted at longer wavelengths.…”

Section: Introductionmentioning

confidence: 99%