Light-responsive molecular systems with multiple photoswitches in C -symmetric designs have enormous application potential. The design part of such molecular systems is critical due to its influence in several properties associated with the photoswitches. In order to tune, and in the evaluation of the design-property relationship, we synthesized 18 tripodal systems with variations in the core, linkers, connectivity, and azo(hetero)arene photoswitches. Through extensive spectroscopic and computational studies, we envisaged the factors controlling near-quantitative photoisomerization in both the directions (bistability) and the thermal stability of the metastable states. Furthermore, we also evaluated the impact of designs in obtaining reversible photo-responsive sol-gel phase transitions, solvatochromism, photo- and thermochromism.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/chem.202004620 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Self-Healing Yet Strong Actuator Materials with Muscle-Like Diastole and Contraction via Multilevel Relaxations.
Adv Mater
December 2024
State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China.
Skeletal muscles represent a role model in soft robotics featuring agile locomotion and incredible mechanical robustness. However, existing actuators lack an optimal combination of actuation parameters (including actuation modes, work capacity, mechanical strength, and damage repair) to rival biological tissues. Here, a biomimetic structural design strategy via multilevel relaxations (α/β/γ/δ-relaxation) modulation is proposed for mechanical robust and healable actuator materials with muscle-like diastole and contraction abilities by orientational alignment of dendritic polyphenol-modified nano-assembles in eutectogels.
View Article and Find Full Text PDFTunable on-chip optical traps for levitating particles based on single-layer metasurface.
Nanophotonics
July 2024
University of Southampton, Southampton, UK.
Optically levitated multiple nanoparticles have emerged as a platform for studying complex fundamental physics such as non-equilibrium phenomena, quantum entanglement, and light-matter interaction, which could be applied for sensing weak forces and torques with high sensitivity and accuracy. An optical trapping landscape of increased complexity is needed to engineer the interaction between levitated particles beyond the single harmonic trap. However, existing platforms based on spatial light modulators for studying interactions between levitated particles suffered from low efficiency, instability at focal points, the complexity of optical systems, and the scalability for sensing applications.
View Article and Find Full Text PDFMain-chain stiff-stilbene photoswitches in solution, in bulk, and at surfaces.
Chem Sci
December 2024
Applied Chemistry Program, Graduate School of Advanced Science and Engineering, Hiroshima University 1-4-1 Kagamiyama Higashihiroshima 739-8527 Japan
Article Synopsis
- * This study introduces a new photoswitch, sterically hindered stiff stilbene (HSS), which shows significant structural changes and stability, allowing for enhanced understanding and control of polymer conformations.
- * The research demonstrates the ability to reverseibly control hydrodynamic volume in solution and achieve significant macroscopic changes in properties like transmittance and wettability, highlighting the potential for advanced applications in smart materials.
Thermal Bistability of Magnetic Susceptibility, Light Absorption, Second Harmonic Generation, and Dielectric Properties in a Polar Spin-Crossover Iron-Rhenium Chain Material.
Angew Chem Int Ed Engl
November 2024
Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland.
The bistability of multiple physical properties driven by external stimuli in a solid is a desired prerequisite for its application in memory devices with convenient data readout. We present a pathway for thermal bistability detectable in four physical properties: magnetic, light absorption, second-harmonic generation (SHG), and dielectric. We report a novel heterometallic (TBA){[Fe(phIN)][Re(CN)]} ⋅ (phIN) (1) (TBA=tetrabutylammonium cation, phIN=phenyl isonicotinate) cyanido-bridged chain material.
View Article and Find Full Text PDFOptical imaging of the stochastic nucleation kinetics and intrinsic activation energy of single spin-crossover nanoparticles.
Proc Natl Acad Sci U S A
November 2024
State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
Cooperative spin crossover (SCO) compounds are one of the most promising molecular bistable solids due to their intriguing thermal hysteresis phenomena around room temperature. It is well known that hysteresis is an essential kinetic effect, however, accurate assessment of the spin transition kinetics of SCO nanomaterials remains scarce. Herein, we developed a thermal-optical methodology to image the thermally induced spin transition kinetics of single SCO nanoparticles in a quantitative, repeatable, and high-throughput manner.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!