Provided that the correct acknowledgement is given and it is not used for commercial purposes. This article in other publications, without requesting further permission from the RSC, Wang,Ĭreative Commons Attribution-NonCommercial 3.0 Unported Licence. Precise peripheral design enables propeller-like squaraine dye with highly sensitive and wide-range piezochromism The piezochromic behavior of SQ-NMe 2 microcrystals is sensitive, high-contrast, and easily reversible, enabling cryptographic applications.
Single-crystal X-ray diffraction structural analysis of two SQ-NMe 2 polymorphs provides direct evidence to illustrate the design concept of such a piezochromic molecule. As such, the pristine SQ-NMe 2 microcrystal exhibits significant fluorescence changes from yellow ( λ em = 554 nm) to orange ( λ em = 590 nm) upon slight mechanical grinding and further to deep red ( λ em = 648 nm) upon heavy mechanical grinding. This precise peripheral design is expected to loosen the molecular packing pattern and facilitate more substantial intramolecular charge transfer (ICT) switching caused by conformational planarization under mechanical stimuli. Here we present a propeller-like squaraine dye SQ-NMe 2 decorated with four peripheral dimethylamines acting as electron donors and spatial obstacles. GLAAD created this guide for communities to defeat book ban attempts, and send a powerful signal of welcome and acceptance.Piezochromic fluorescent (PCF) materials that feature high sensitivity and wide-range switching are attractive in intelligent optoelectronic applications but their fabrication remains a significant challenge. The vast majority of these bans target books by and about LGBTQ people and all people of color. Like bills targeting health care, drag performance, pronouns and public spaces, book bans baselessly and disingenuously purport to be about protecting children and parents’ rights, when their true intent is aimed at limiting the rising visibility and acceptance of LGBTQ youth, and removing parents’ rights to make private health care decisions for their families, or determine what their own children can read.Īccording to the American Library Association, 2022 saw 1,269 documented demands to pull titles from library shelves, nearly doubling the 729 challenges in 2021, an astounding 713% increase from the previous year. The current story of book bans is interwoven with the story of the skyrocketing number of legislative proposals targeting LGBTQ people and especially, transgender and nonbinary youth.
Guía para una Cobertura Objetiva de Personas y Temas Transgénero.Más Recursos para Profesionales de los Medios.Guía GLAAD para Profesionales de los Medios.Media Guide: State Legislation About LGTBQ People.
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