Water molecular bridge-induced selective dual polarization in crystals for stable multi-emitters

Xing, Yi; Li, Zhongyu; Baryshnikov, Gleb V.; Shen, Shen; Ye, Danfeng; Ågren, Hans; Zhu, Liangliang

doi:10.1039/d2sc00908k

Cited by 4 publications

(2 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to the precursor-transferred emission properties, the PDs can exhibit an excitation-dependent emission (Figure i), covering the entire visible spectrum (see the corresponding CIE in Figure j). This is due to that species with different degrees of PD polymerization typically cause multiple emission centers, which can be regarded as a nanocore luminescent mechanism. The total absolute luminescence quantum efficiency of PDs has been raised up to 41.5% after UV irradiation, when the absolute luminescence quantum efficiency of M-1 is 20.4% (Figure k).…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient Room-Temperature Light-Induced Synthesis of Polymer Dots: A Programming Control Paradigm of Polymer Nanostructurization from Single-Component Precursor

Zhang,

Li,

Luo

et al. 2023

J. Am. Chem. Soc.

Self Cite

View full text Add to dashboard Cite

Polymer dots (PDs) have raised considerable research interest due to their advantages of designable nanostructures, high biocompatibility, versatile photoluminescent properties, and recyclability as nanophase. However, there remains a lack of in situ, real-time, and noncontact methods for synthesizing PDs. Here we report a rational strategy to synthesize PDs through a welldesigned single-component precursor (an asymmetrical donor− acceptor−donor′ molecular structure) by photoirradiation at ambient temperature. In contrast to thermal processes that normally lack atomic economy, our method is mild and successive, based on an aggregation-promoted sulfonimidization triggered by photoinduced delocalized intrinsic radical cations for polymerization, followed by photooxidation for termination with structural shaping to form PDs. This synthetic approach excludes any external additives, rendering a conversion rate of the precursor exceeding 99%. The prepared PDs, as a single entity, can realize the integration of nanocore luminescence and precursor-transferred luminescence, showing 41.5% of the total absolute luminescence quantum efficiency, which is higher than most reported PD cases. Based on these photoluminescent properties, together with the superior biocompatibility, a unique membrane microenvironmental biodetection could be exemplified. This strategy with programming control of the single precursor can serve as a significant step toward polymer nanomanufacturing with remote control, high-efficiency, precision, and real-time operability.

show abstract

Section: Resultsmentioning

confidence: 99%

Highly Efficient Room-Temperature Light-Induced Synthesis of Polymer Dots: A Programming Control Paradigm of Polymer Nanostructurization from Single-Component Precursor

Zhang,

Li,

Luo

et al. 2023

J. Am. Chem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

“…H-bonded organic frameworks (HOFs) are also constructed by H-bonds . In photophysics, it has been confirmed that H-bonds could decrease the nonradiative relaxation and enhance emission by promoting a more rigid conformation. − Meanwhile, some reports speculated that heteroatoms-involved H-bonds may also benefit electron delocalization, but this assumption has yet to be experimentally confirmed. − However, if this hypothesis is accurate, the following issues arise: why is the luminescence quantum yield (QY) so low in most H-bond-rich systems, including hydrogels and water clusters, as illustrated in Scheme b? − …”

mentioning

confidence: 99%

Activating Electronic Delocalization: Through-Space Lone-Pair Interactions versus Hydrogen Bonding

Xiong,

Zhang,

Zhang

et al. 2024

ACS Materials Lett.

View full text Add to dashboard Cite

It is still unclear how weak interactions specifically affect electronic structures. Here, we systematically reduce the number of N–H bonds within diarylmethane (DAM), precisely diminishing the number of hydrogen bonds (H-bonds). Contrary to the widely reported result that H-bonds could enhance molecular brightness by promoting electron delocalization, DAMs lacking H-bonds exhibit superior luminescence, compared to DAMs with H-bonds in both dilute solutions and solid states. It is indicated that H-bonds tend to induce n-electron localization, preventing the formation of through-space lone-pair conjugation (n–n TSC). In addition, unlike the widely studied through-space π–π conjugation that only existed in the aggregate state, the n–n TSC can even stabilize the conformation and is expressed in dilute solutions. Herein, we not only achieve bright white-light emissions in nonconjugated small molecules but also reveal the surprisingly competitive relationship between H-bonds and n–n TSC in electronic delocalization, providing a new strategy for designing excellent optoelectronic materials via the n-electron bridge.

show abstract

Luminescent properties and recent progress in applications of lanthanide metal-organic frameworks

Zhang

Zhu²,

Yue³

2023

Chinese Chemical Letters

View full text Add to dashboard Cite

Water molecular bridge-induced selective dual polarization in crystals for stable multi-emitters

Abstract: In solid states, molecular polarization of donor-acceptor (D-A) molecules is basically implemented via external polarizing source (e. g., electric field). However, inside-system chemical polarization approaches are less concerned due to...

Cited by 4 publications

References 55 publications

Highly Efficient Room-Temperature Light-Induced Synthesis of Polymer Dots: A Programming Control Paradigm of Polymer Nanostructurization from Single-Component Precursor

Highly Efficient Room-Temperature Light-Induced Synthesis of Polymer Dots: A Programming Control Paradigm of Polymer Nanostructurization from Single-Component Precursor

Activating Electronic Delocalization: Through-Space Lone-Pair Interactions versus Hydrogen Bonding

Luminescent properties and recent progress in applications of lanthanide metal-organic frameworks

Contact Info

Product

Resources

About