utilization of hydrogen bonding in the development of receptors for recognition of anions 15. Although cation receptors have been studied for more than four decades but the development of anion receptors received less attention. Several reasons why reliable sensing of anions is a particularly challenging area of research are: (i) anions are larger than isoelectronic cations and, therefore, have lower charge-to-radius (surface) ratio, a feature that makes the electrostatic binding of anions to the receptors less effective [61, (ii) anions have a wide range of geometries and are often pres- ent in delocalized forms, which results in higher complexity de- sign and synthesis of receptors and (iii) pH sensitivity. Therefore, to achieve the desired selectivity, the combination of electrostatic attraction, hydrogen bonding and a suitable framework onto which these structural components can be assembled needs to be taken into consideration when designing artificial anionic hosts 17l. Among various anions, cyanide is one of the most concerned an- ions because it is being widely used in synthetic fibers, resins, her- bicide, and the gold-extraction process [8]. Unfortunately, cyanide anion is extremely detrimental, and could be absorbed through lungs, gastrointestinal track, and skin, leading to vomiting, convul- sion, loss of consciousness, and eventual death [9]. According to the World Health Organization (WHO). only water with cyanide concentration lower than 1.9 HM is drinkable [10]. Thus, there ex ists a need for an efficient sensing system for cyanide to monitor its concentration from contaminant sources. As a result, the detection of cyanide has attracted considerable attention in recent years, and many cyanide sensors have been