Two-color polarized emission and angle-dependent luminescence based on layer-by-layer assembly of binary chromophores/layered double hydroxide thin films

Gao, Rui; Lei, Xiaodong; Chen, Mingxing; Yan, Dongpeng; Wei, Min

doi:10.1039/c3nj00619k

Cited by 14 publications

(4 citation statements)

References 51 publications

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“…Because of the finite thickness of thin films, they will show an excitation angle dependence of emission intensity because of effects such as excitation photon density and penetration depth that have no influence in bulk luminescent materials. Angular dependencies for thin film luminescence have been presented in refs − and typically the intensity varies with angle, but there is still emission from all angles. However, for our film, the upconversion emission is obtained only with incident angles between ca.…”

Section: Resultsmentioning

confidence: 99%

Three- and Two-Photon NIR-to-Vis (Yb,Er) Upconversion from ALD/MLD-Fabricated Molecular Hybrid Thin Films

Giedraityte

Tuomisto

Lastusaari

et al. 2018

ACS Appl. Mater. Interfaces

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We report blue, green, and red upconversion emissions with strongly angular-dependent intensities for a new type of hybrid (Y,Yb,Er)–pyrazine thin films realized using the atomic/molecular layer deposition thin-film fabrication technology. The luminescence emissions in our amorphous (Y,Yb,Er)–pyrazine thin films of a controllable nanothickness originate from three- and two-photon NIR-to-vis excitation processes. In addition to shielding the lanthanide ions from nonradiative de-excitation, the network of interconnected organic molecules serves as an excellent matrix for the Yb3+-to-Er3+ excitation energy transfer. This suggests a new approach to achieve efficient upconverting molecular materials with the potential to be used for next-generation medical diagnostics, waveguides, and surface-sensitive detectors.

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Section: Resultsmentioning

confidence: 99%

Three- and Two-Photon NIR-to-Vis (Yb,Er) Upconversion from ALD/MLD-Fabricated Molecular Hybrid Thin Films

Giedraityte

Tuomisto

Lastusaari

et al. 2018

ACS Appl. Mater. Interfaces

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“…The anisotropy of the chromophore molecular packing in low‐dimensional molecule‐based micro‐/nanostructures accompanied by the high organization can often lead to a high degree of fluorescence polarization 53. For the two‐component GD 2 BSB system,20 the emission intensities varied significantly between the parallel ( I ∥ ) and perpendicular ( I ⊥ ) polarized directions, with an anisotropy value54 r of 0.71 [ r =( I ∥ − I ⊥ )/( I ∥ +2 I ⊥ )] (Figure 15 d–g).…”

Section: Functionality and Applicationsmentioning

confidence: 99%

Micro‐/Nanostructured Multicomponent Molecular Materials: Design, Assembly, and Functionality

Yan

2015

Chemistry A European J

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Molecule-based micro-/nanomaterials have attracted considerable attention because their properties can vary greatly from the corresponding macro-sized bulk systems. Recently, the construction of multicomponent molecular solids based on crystal engineering principles has emerged as a promising alternative way to develop micro-/nanomaterials. Unlike single-component materials, the resulting multicomponent systems offer the advantages of tunable composition, and adjustable molecular arrangement, and intermolecular interactions within their solid states. The study of these materials also supplies insight into how the crystal structure, molecular components, and micro-/nanoscale effects can influence the performance of molecular materials. In this review, we describe recent advances and current directions in the assembly and applications of crystalline multicomponent micro-/nanostructures. Firstly, the design strategies for multicomponent systems based on molecular recognition and crystal engineering principles are introduced. Attention is then focused on the methods of fabrication of low-dimensional multicomponent micro-/nanostructures. Their new applications are also outlined. Finally, we briefly discuss perspectives for the further development of these molecular crystalline micro-/nanomaterials.

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“…43 Furthermore, they have reported the layer-bylayer co-assembly of two types of two-color (blue/red) luminescent ultrathin lms (UTFs) by using different photofunctional anions and Mg-Al-layered double hydroxide (LDH) nanosheets as the basic building blocks with well-dened two-color polarized uorescence. 44 In another research work by Yan et al, a new type of hostguest UV-blocking material with higher photoluminescence quantum yield has been synthesized by the introduction of…”

Section: Introductionmentioning

confidence: 99%

Molecular design confirmation for proposition of improved photophysical properties in a dye-intercalated layered double hydroxides

2016

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Two-color polarized emission and angle-dependent luminescence based on layer-by-layer assembly of binary chromophores/layered double hydroxide thin films

Cited by 14 publications

References 51 publications

Three- and Two-Photon NIR-to-Vis (Yb,Er) Upconversion from ALD/MLD-Fabricated Molecular Hybrid Thin Films

Three- and Two-Photon NIR-to-Vis (Yb,Er) Upconversion from ALD/MLD-Fabricated Molecular Hybrid Thin Films

Micro‐/Nanostructured Multicomponent Molecular Materials: Design, Assembly, and Functionality

Molecular design confirmation for proposition of improved photophysical properties in a dye-intercalated layered double hydroxides

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