Self-Assembled Nanodot Actuator with Changeable Fluorescence by π–π Stacking Force Based on a Four-Armed Foldable Phthalocyanine Molecule and Its Supersensitive Molecular Recognition

Abstract

Designing intelligent molecules and smart nanomaterials as molecular machines is becoming increasingly important in the nanoscience fields. Herein, we report a nanodot actuator with changeable fluorescence by π–π stacking force based on a four-armed foldable phthalocyanine molecule. The assembled nanodot possessed a three-dimensional molecular space structure and multiple supramolecular interactions. The arms of the nanodot could fold and open intelligently in response to environmental molecular stimuli such as natural plant mimosa, which could lead to multiple variable fluorescence emissions. The nanodot was highly sensitive to the biomolecule thyroxine at the molecular level. The accurate molecular recognition and the changeable fluorescence conversion of the nanodot were attributed to multiple supramolecular interactions, including photoinduced electron transfer (PET), intramolecular fluorescence resonance energy transfer (FRET), and π–π stacking of the nanodots, resulting in an intelligent “nanodot machine with folding arms”. The self-assembled nanodot actuators with changeable fluorescence have potential applications in advanced intelligent material fields.

Design of 1,8‐Naphthalimide‐Based Fluorescent Functional Molecules for Biological Application: A Review

“…Configuration conversion‐induced ultra‐sensitive detection is currently a popular design method [24] . In 2022, Hu et al.…”

“…Configuration conversion-induced ultra-sensitive detection is currently a popular design method. [24] In 2022, Hu et al reported a novel triazine-quinoline-appended 1,8-naphthalimide fluorescence sensor (5) that had a fluorescence quenching effect on Hg 2 + within 2 min in phosphate buffer/EtOH (v/v = 3/ 2) (Figure 3b). [25] Once the receptor at the C-4 position coordinated with Hg 2 + in 1 : 1, fluorescence emission intensity at 536 nm had a 14-fold decrease.…”

Efficient catalysis of H2O2with ionic liquid molecules to generate hydroxyl radicals and application in green chemistry cotton processes

“…Yield: 91.85%; mp: 238-240 °C; FT-IR ν (cm −1 ): 3354, 3157, 3089, 2938, 2846, 1682, 1557, 1432, 1374, 1260, 1171, 966, 841, 769; 1 H NMR (600 MHz, DMSO-d 6 , δ ppm): 9.36 (s, 1H, -N + vCH-N-), 7.86 (s, 1H, -N-CHvCH-), 7.76 (s, 1H, -CHvCH-N + -), 7.44-7.56 (q, 4H, Ar-H), 5.51 (s, 2H, -CH 2 -), 3.93 (s, 2H, -CH 2 -), 3.88 (s, 3H, -CH 3 ), 2.68 (s, 2H, -CH 2 -), 1.75 (s, 6H, -CH 2 -). 13 13…”

“…They can be utilized in green reactions and processes, disease treatment, and novel material design. [11][12][13] Hydrogen peroxide (H 2 O 2 ) as an oxidative agent can produce free radicals and is widely used in the process of environmental disinfection, biomass bleaching and organic pollution treatment. Although the hydrogen peroxide molecule plays an important role in many green chemical reactions, its high activation energy and ineffective decomposition limit its efficiency in applications.…”

Liquid Crystal Nanoparticle Actuator by Polymer Surfactant-Assisted Assembly for Fabricating Bioinspired Smart Interface with Adjustable Light and Changeable Color

“…Advanced intelligent bionic interfaces assembled by nanoparticles with smart color changes by environmental stimuli have attracted much attention, which include photonic crystals with structural colors, photochromic materials, and force-chromic materials. − Inspired by natural biological skin with intelligent color changes, wearable materials, artificial skin, and intelligent interior decoration with autocontrol of brightness and color transformation, including controllable moisture permeability and heat transfer, have important applications. − Skin color changes and energy transfer in some animals, such as chameleons and octopuses, have inspired researchers to develop smart color-changing materials. − …”