Featuring speed, selectivity and flexibility, Rapid Visual Detection (RVD) prevails widely in fields associated with analytical chemistry. RVD relies on reasonable sensors fabricating, which is designed to detect molecules of interest by following three steps:recognition, indication and processing. Among those with great effects, organic photochromic-based sensors advances fast in RVD related fields recently, for tunable recognizing units, chromic/fluorescent bi-stable indication and feasible quality/quantity dual-processing. This paper reviews the recent development and prospects the future potential of organic photochromic-based sensors.

Contents
1 Introduction
2 Applications of organic photochromic materials in rapid visual detection
2.1 Applications of coordination-based photochromic materials
2.2 Applications of reaction-based photochromic materials
2.3 [JP3]Applications of ‘gate-effect’-based photochromic materials
2.4 Applications of undefined-based photochromic materials
3 Conclusion