US 12,540,278 B2 · Temperature programmable small molecules for thermoresponsive smart windows and applications thereof

Abstract

Design and applications of a class of water-soluble small molecules represented by formula 1. The molecules, in their dilute aqueous solutions, exhibit lower critical solution temperature (LCST) phase transitions near room temperature, inducing a temperature triggered switching of opacity. Further, disclosed is a scalable smart window, akin to a radiative energy management system, that can be incorporated into the built environment for imparting energy efficiency. The window fabrication is facile wherein the aqueous solution is sandwiched between two transparent glass panes to enable modulation of light and heat transmission. The dynamic window of present invention represents with multifarious applications in developing scalable, smart energy management systems for indoor building environments is envisioned to be a major contribution towards cost effective smart glass technologies.

Claims20

Dependent claims

A molecule of general formula 1

wherein,
R1 is selected from [(CH2)a—O]b—CH3 wherein, a is an integer a=1 or 2, b is an integer b=2-20;
R is independently selected from H, CN, or halogens;
and
Ar is an aryl group, wherein the aryl group comprises of single or multiple fused rings, wherein the number of multiple fused rings is 1-5, wherein the aryl groups optionally substituted with halogen, OH, —CN, —O(C1-C30 alkyl chain), —(NH)1-2(C1-C30 alkyl chain), —N((C1-C30 alkyl chain))2, —COOH, or —COO(C1-C30 alkyl chain).

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/698,735Filed 23 Sep 2022

Priority

IN 2021130453394 Oct 2021

Published

US 2024/0400898 A15 Dec 2024

Granted

3 Feb 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

C09K 19/061
Non-steroidal liquid crystal compounds: linear compounds without any rings
C09K 19/52
Liquid crystal materials: characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid…
C09B 23/0058
The substituent being a COOH and/or a functional derivative thereof: the substituent being CN
C09B 23/04
The polymethine chain containing an odd number of >CH- or >C[alkyl]- groups: one >CH- group, e.g. cyanines, isocyanines, pseudocyanines

Temperature programmable small molecules for thermoresponsive smart windows and applications thereof

Life of this patent

Temperature programmable small molecules for thermoresponsive smart windows and applications thereof

Life of this patent

Abstract

Claims20