Chromatic polydiacetylene with novel sensitivity

Abstract

Conjugated polymers have been investigated for a number of applications in optoelectronics and sensing due to their important electronic and optical properties. For instance, polydiacetylene (PDA) may change color in response to external stimuli and has been extensively explored as a material for chromatic sensors. However, the practical applications of PDA materials have been largely hampered by their irreversible chromatic transitions under limited stimuli such as temperature, pH, and chemical. As a result, much effort has been paid to improve the chromatic reversibility and increase the scope of external stimuli for PDA. In this tutorial review, the recent development of PDA materials which show reversible chromatic transition and respond to new stimuli including light and electrical current has been described.

Induction and control of supramolecular chirality by light in self-assembled helical nanostructures

“…The handedness of the aggregates is exclusively dictated by the rotational direction of the CPL and can even be switched in a totally reversible manner. Furthermore, by incorporating a diacetylene (DA) moiety that undergoes topochemical photopolymerization by ultraviolet (254 nm) 24, 25 , we demonstrate that the desired handedness can be permanently locked by circularly polarized ultraviolet light (CPUL) irradiation, which knits the self-assembled structure with covalent bonds [26][27][28] . We believe this to be the first example of light-induced self-assembling systems where the entire process of induction, control and locking of supramolecular chirality can be solely manipulated by CPL.…”

Ultrafast and reversible thermochromism of a conjugated polymer material based on the assembly of peptide amphiphiles

“…2,3 The chromatic transition of PDA can be directly detected by the naked eye, enabling a broad spectrum of optoelectronic and sensing applications. [4][5][6][7][8][9] However, the available PDA materials oen suffer from a slow response time (tens of seconds to minutes), low reversibility (tens of cycles or even irreversible), a narrow working temperature range (less than 90 C without the introduction of inorganic components) and poor mechanical properties, mainly due to the relatively low structural regularity and strength of molecular interactions.…”

“…Based on the same reasons, the available chromatic polymers have generally been made into powders or lms, and it remains challenging to achieve continuous bres that are required for wearable electronics, which are a promising direction in sensing applications. To date, many strategies towards the design of thermochromatic PDA and other polymer materials have been attempted, 3 while it has remained impossible to overcome either of the above long-standing challenges.…”

Sequentially Programmable and Cellularly Selective Assembly of Fluorescent Polymerized Vesicles for Monitoring Cell Apoptosis

“…The blue polydiacetylene is susceptible to a wide range of external stimuli (temperature, pressure, light, etc. ),38, 39, 40 leading to chromic changes 29, 30, 41, 42. The color of PDA changes from blue to carmine red when heated at 70 °C.…”