In the current world political climate, technology that offers accurate, real-time and selective sensing of explosive compounds is increasingly important. Whether it is for use in airports, large public events or landmine remediation, security teams require equipment for the remote detection of these potentially devastating chemicals. We have developed fluorescent dendritic materials that are able to sense explosive vapours such as high electron affinity analogues of explosives such as 1,4-dinitrobenzene (DNB) and 2,4-dinitrotoluene (DNT). In a previous experiment we observed swelling of films in contact with nitroaromatic explosives and were able to model the distribution of analyte within the film. In this experiment we intend to explore a real-world non-aromatic analyte, 2,3-dimethyl-2,3-dinitrobutane (DMNB), explore varying dendrimer dimensionality and compare to a polymeric sensor.