[dhosek]

If you play those notes in a close voicing they can be jarring (although I went through a phase of composing with close clusters of tones just like that in my 20s), but if you instead play D, F up a minor third and then put the E a major seventh above the F, you end up with a chord that functions like Dmin9 (or more accurately DminAdd9). The missing fifth gets added psychoacoustically (jazz pianists have taken advantage of this for ages by playing the 3-7 of a chord in their left hand and the melody in the right hand, letting the bass cover the root and the brain of the listener add the 5).