1-Azido-3,6,9-trioxaundecane-11-ol is a linear oligoether alcohol compound functionalized with an azide on one end. It is useful as a spacer and linker between compounds. Oligoether compounds similar to 1-Azido-3,6,9-trioxaundecane-11-ol have been described in the preparation of donor/acceptor pairs for FRET studies that use the oligoether spacer to link the two components.