3 years ago

Building Block Dependent Morphology Modulation of Cage Nanoparticles and Recognition of Nitroaromatics

Building Block Dependent Morphology Modulation of Cage Nanoparticles and Recognition of Nitroaromatics
Koushik Acharyya, Shubhadip Chakraborty, Bijnaneswar Mondal, Partha Sarathi Mukherjee, Aniket Chowdhury
Morphology of nanomaterials has a strong impact on their chemical/physical properties, and controlled synthesis of such materials with desirable morphology is a major challenge. This article presents the role of a building block in the morphology of organic cage particles. In this context, three organic cages (A3X2, B3X2, and C3X2) were devised from triphenylamine-based dialdehydes (A–C) and a flexible triamine (X) by utilizing dynamic imine chemistry. All of the synthesized cages were characterized by various spectroscopic techniques, which suggested the formation of [3+2] assembled architectures. Though the cages are isostructural, structural variation in the aldehyde building blocks imparted by the incorporation of phenyl moieties into the triphenylamine core produces morphologically diverse cage particles, as indicated by SEM. The synthesized cages were found to be fluorescent; the reduced analogue of cage A3X2 (A3X2r) was tested to explore its use as a chemosensor for the detection of nitroaromatic explosives. The experimental findings suggest high selectivity and sensitivity of A3X2r towards picric acid (PA) among the various nitroaromatics tested. A theoretical investigation of fluorescence quenching suggested that formation of a ground-state charge-transfer complex with a resonance energy-transfer (RET) process could be the main reason behind such selectivity of the cage towards PA. Control over morphology: The morphology of isostructural [3+2] self-assembled organic imine-based architectures was found to greatly depend on the structural features of aldehyde building blocks A–C (see figure; X=flexible triamine). The highly fluorescent nature of such architectures was utilized to detect nitroaromatic compounds (NACs). The reduced analogue of cage A3X2 was found to be very selective and sensitive towards picric acid.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201700885

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.